0:00:02 > 0:00:04We've got a television show of our own
0:00:04 > 0:00:06Making stuff that's been designed by you lot at home
0:00:06 > 0:00:10Building your inventions the best that we can
0:00:10 > 0:00:13Mostly out of rubbish from the back of our van
0:00:13 > 0:00:17We've even got a title that will grab your attention
0:00:17 > 0:00:19All together now...
0:00:19 > 0:00:21Ed and Oucho's Excellent Inventions!
0:00:23 > 0:00:25Oh, dear.
0:00:25 > 0:00:27The old van doesn't sound too healthy, does it?
0:00:29 > 0:00:34For a minute there, I thought the van was going to explode or something.
0:00:34 > 0:00:35LOUD EXPLOSION
0:00:37 > 0:00:40Unless that's part of a magic show, I think we're in trouble.
0:00:43 > 0:00:47- LOUD BANG - It's not part of a magic show.
0:00:47 > 0:00:49SPEAKS CACTINIAN
0:00:49 > 0:00:51Let's go and surprise Molly.
0:00:51 > 0:00:53SPEAKS CACTINIAN
0:00:53 > 0:00:56What do you mean who? Molly.
0:00:56 > 0:01:00She wrote to us? With this really good idea for a Rainbow-a-go-go.
0:01:00 > 0:01:02Yeah? You spoke to her mum.
0:01:02 > 0:01:06- You found out what her favourite thing in the world is.- Oh! Di, di.
0:01:06 > 0:01:08You got there in the end, didn't you?
0:01:08 > 0:01:10Come on, let's go and surprise her.
0:01:10 > 0:01:13Ed, Ed, Ed. SPEAKS CACTINIAN
0:01:13 > 0:01:15Costumes?
0:01:19 > 0:01:22You're absolutely sure you heard right about this?
0:01:22 > 0:01:24Oh! Di, di, di. SPEAKS CACTINIAN
0:01:24 > 0:01:27I don't look nice - I look like a total dinger.
0:01:27 > 0:01:30- No.- Oh, look, Molly's dad's got a camper van like ours.
0:01:30 > 0:01:32SPEAKS CACTINIAN
0:01:35 > 0:01:41That's a Westfalia 1972. Since when were you a world expert on vans?
0:01:41 > 0:01:45- Oh, maybe Molly could fix our van while we make her invention.- Oh, di.
0:01:48 > 0:01:50Surprise!
0:01:50 > 0:01:53Hi, Ed, hi, Oucho.
0:01:53 > 0:01:56- Hallo!- Why are you dressed as goblins?
0:01:56 > 0:01:58No, we're not goblins. We're...elves!
0:01:58 > 0:02:00Ding-ding-ding, ding-a-ding-ding.
0:02:00 > 0:02:04- Why are you dressed as elves? - SPEAKS CACTINIAN
0:02:04 > 0:02:05Yeah, because you love elves.
0:02:05 > 0:02:07Happy elf day! Hurrah!
0:02:07 > 0:02:09Hurrah for our elfic friends.
0:02:09 > 0:02:11Ding-ding-ding, ding-a-ding-ding.
0:02:11 > 0:02:12No, I don't.
0:02:12 > 0:02:14Yes, you do.
0:02:14 > 0:02:15Di, di. SPEAKS CACTINIAN
0:02:15 > 0:02:18- Yeah, you got all the Elvis films. - SPEAKS CACTINIAN
0:02:18 > 0:02:20And the Elvis albums...
0:02:20 > 0:02:22Elvis. I love Elvis.
0:02:22 > 0:02:24Can we come in?
0:02:24 > 0:02:25OK, but you have to take your shoes off.
0:02:25 > 0:02:29- Because of the carpet? - No, because you look stupid.
0:02:30 > 0:02:32SPEAKS CACTINIAN
0:02:32 > 0:02:36Oucho, don't be so rude, shouting about cake like that. Have you got any cake?
0:02:36 > 0:02:38I've got a bit of carrot cake.
0:02:38 > 0:02:40Carrot...cake?
0:02:40 > 0:02:42Carrot is not a flavour for a cake.
0:02:42 > 0:02:44- Chocolate is a flavour for a cake. - SPEAKS CACTINIAN
0:02:44 > 0:02:47- Yeah, or bananas. Carrot cake. Ugh! - Ugh!
0:02:47 > 0:02:51Oh, by the way, couldn't help noticing you've got a van like ours outside.
0:02:51 > 0:02:54No, ours is a Westfalia 1972.
0:02:54 > 0:02:56SPEAKS CACTINIAN
0:02:56 > 0:03:00Yeah, whatever. Anyway, ours is broken and I wondered if you could fix it.
0:03:00 > 0:03:03- I can't, but my dad might be able to.- Can you give him a shout?
0:03:03 > 0:03:05Dad!
0:03:05 > 0:03:06Yes, Molly?
0:03:06 > 0:03:09- Do you think you could fix Ed and Oucho's van?- I'll have a look.
0:03:09 > 0:03:12Oh, great. Cheers, and if you find any non-carrot based cake
0:03:12 > 0:03:16on your travels, it wouldn't be the worst thing in the world.
0:03:21 > 0:03:23So just pop that on your head there.
0:03:23 > 0:03:26This will suck out all the great ideas.
0:03:26 > 0:03:29Just tell us all about it.
0:03:29 > 0:03:33I want to invent a weather machine so I can party with my friends.
0:03:33 > 0:03:39I want it to make fluffy white clouds and rainbows.
0:03:39 > 0:03:41It should also have a doughnut drawer
0:03:41 > 0:03:44and a disco ball to make sparkly lights
0:03:44 > 0:03:48and I'd like it to play my favourite Elvis songs so I can party with my friends.
0:03:48 > 0:03:49# My blue suede shoes... #
0:03:49 > 0:03:52That sounds great. What's your favourite Elvis song, Molly?
0:03:52 > 0:03:54Blue Suede Shoes.
0:03:54 > 0:03:58- When are your friends coming to par-tay with the Rainbow-a-go-go? - On Saturday.
0:03:58 > 0:04:00- That's in three days.- Di.
0:04:00 > 0:04:03I found out what's wrong. There's a banana stuck in the exhaust.
0:04:03 > 0:04:07- How many times have I told you it eats petrol?! - SPEAKS CACTINIAN
0:04:07 > 0:04:08- Yes, it does. - SPEAKS CACTINIAN
0:04:08 > 0:04:13It'll cost a fortune to fix it and we're broke. We wasted all our money on these stupid costumes!
0:04:13 > 0:04:15SPEAKS CACTINIAN
0:04:15 > 0:04:17Yes, it would be great to have some gold.
0:04:17 > 0:04:21- Unfortunately we haven't got any. - SPEAKS CACTINIAN
0:04:21 > 0:04:24We are not going to find any at the end of the rainbow.
0:04:24 > 0:04:27I keep telling you, it's a myth. He talks a load of twaddle.
0:04:27 > 0:04:30- We'll have to do something normal. Like earn it.- Di.
0:04:30 > 0:04:34- How do we earn money again? - SPEAKS CACTINIAN
0:04:34 > 0:04:37Oh, yes, by making inventions on the telly.
0:04:37 > 0:04:41So, let's make money - I mean let's make Molly's Rainbow-a-go-go!
0:04:42 > 0:04:45Ed and Oucho's Excellent Inventions!
0:04:45 > 0:04:49Look at all this great stuff I found in the van.
0:04:49 > 0:04:52And best of all, da-da-da-da!
0:04:52 > 0:04:56Doughnuts. For the Rainbow-a-go-go. This is going to be a piece of cake.
0:04:56 > 0:04:59- SPEAKS CACTINIAN - It's just an expression.
0:04:59 > 0:05:02- Ah. Oucho, did you eat the doughnuts?- Nos.
0:05:02 > 0:05:05- Did you eat the doughnuts?- Nos. - Did you eat the doughnuts?
0:05:05 > 0:05:06- Nos.- Did you eat the doughnuts?
0:05:06 > 0:05:07- Nos!- Did you eat the doughnuts?
0:05:07 > 0:05:10- Di.- I thought this was going to be a piece of cake.
0:05:10 > 0:05:13- SPEAKS CACTINIAN - No, it's just an expression.
0:05:13 > 0:05:16Right. Buy more doughnuts.
0:05:16 > 0:05:19Well, we've got a music player though, this old stereo.
0:05:19 > 0:05:21SPEAKS CACTINIAN
0:05:21 > 0:05:23- No, Dolly Parton's not inside it. - SPEAKS CACTINIAN
0:05:23 > 0:05:25- No, she's not. - SPEAKS CACTINIAN
0:05:25 > 0:05:27You didn't shrink her with your special elf powers.
0:05:27 > 0:05:31- That happened in your mind, didn't it?- Di.- Also,
0:05:31 > 0:05:34we've got these...for clouds.
0:05:34 > 0:05:36Look at that.
0:05:36 > 0:05:39And with this,
0:05:39 > 0:05:40we can make the rain, you see?
0:05:40 > 0:05:42It's going to be great.
0:05:42 > 0:05:47I'm just worried about the rainbow-maker and that other thing, the disco ball. Oh, I know.
0:05:47 > 0:05:50I'll ask the internet. I'll just give it a ring.
0:05:50 > 0:05:52I'm sure it's not busy.
0:05:58 > 0:06:00- PHONE RINGS - Who's that?
0:06:00 > 0:06:03- Hello.- It's Ed here.
0:06:03 > 0:06:06Hi, Ed. Listen, I don't usually take phone calls.
0:06:06 > 0:06:10Could you refer to one of my many excellent websites? I'm a bit tied up at the moment.
0:06:10 > 0:06:12The thing is, we're in a hurry.
0:06:12 > 0:06:16We have to make a disco ball for this thing called a Rainbow-a-go-go.
0:06:16 > 0:06:20A disco ball... Right. I've got one here.
0:06:20 > 0:06:23- What colour is it?- It doesn't have a colour. It's a shiny ball.
0:06:23 > 0:06:26Shiny ball. Right. Well, what colour is it?
0:06:26 > 0:06:28It's not got a colour. It's a disco ball.
0:06:28 > 0:06:31Listen, it's all to do with light.
0:06:31 > 0:06:34Hang on, I've got a page about it somewhere.
0:06:34 > 0:06:37Here it is. One of my better ones too. You see light,
0:06:37 > 0:06:39like from the sun or a bulb, may appear to be white
0:06:39 > 0:06:42but it's actually made of lots of different colours.
0:06:42 > 0:06:47- Red, yellow, orange, green, blue, violet.- Wha...? Hm, yeah.
0:06:47 > 0:06:49Are you following me? Do you understand?
0:06:49 > 0:06:52When light hits an object, some of the colours are absorbed by it
0:06:52 > 0:06:54and and others bounce back off it into our eyes,
0:06:54 > 0:06:56which is why we see it as the colour.
0:06:56 > 0:06:59I mean, take for example something yellow. Say, custard.
0:06:59 > 0:07:01Argh!
0:07:01 > 0:07:05Oh, not custard. Ohh!
0:07:05 > 0:07:07Oh, take a banana.
0:07:07 > 0:07:09Right.
0:07:09 > 0:07:12Now, when light hits a banana, some of the colours are absorbed by it
0:07:12 > 0:07:15and others bounce back off it into our eyes,
0:07:15 > 0:07:17which is why we see the banana as yellow.
0:07:17 > 0:07:19Likewise...
0:07:19 > 0:07:20tomato sauce.
0:07:20 > 0:07:23No, not tomato sauce!
0:07:23 > 0:07:25No. Tomato!
0:07:25 > 0:07:27Tomato!
0:07:30 > 0:07:34Now, when light hits a tomato, the light bounces off it,
0:07:34 > 0:07:37it absorbs some of the colours except for red,
0:07:37 > 0:07:39which bounces off it into our eyes,
0:07:39 > 0:07:43- which is why we see the tomato as red. Are you following me?- What? Oh.
0:07:43 > 0:07:45Are you even listening to me?
0:07:45 > 0:07:48You phone me up, you interrupt my string experiment
0:07:48 > 0:07:51and you don't even listen to my answer?
0:07:51 > 0:07:54Er, yeah, you've been very helpful, goodbye.
0:07:54 > 0:07:57Oh that internet is boring. It'll never catch on.
0:07:57 > 0:07:59Basically, if we want to make a disco ball
0:07:59 > 0:08:02- we just need a big shiny ball. - SPEAKS CACTINIAN
0:08:02 > 0:08:04We've got a ball? Oh.
0:08:04 > 0:08:06All right. Now.
0:08:06 > 0:08:09How do we make it shiny? What's shiny?
0:08:09 > 0:08:10SPEAKS CACTINIAN
0:08:10 > 0:08:14Our van. We'll paint it the same colour as our van. Piece of cake.
0:08:14 > 0:08:16- SPEAKS CACTINIAN - It's just an expression!
0:08:16 > 0:08:19Let's get this stuff and make our weather machine.
0:08:23 > 0:08:25- Are you excited?- Yes.
0:08:25 > 0:08:27This is my favourite part of the show.
0:08:27 > 0:08:30Seeing the look on their little faces. OK?
0:08:30 > 0:08:32Ta-da!
0:08:32 > 0:08:35- Wow!- You see, dreams really can come true.
0:08:35 > 0:08:37What are your first impressions?
0:08:37 > 0:08:42- It's rubbish.- Why?- Well, that's a bit of card.
0:08:42 > 0:08:44That's a rainbow. Oucho got that out of the sky.
0:08:44 > 0:08:47There's also this here, that's your disco ball.
0:08:47 > 0:08:51I know it may not look much now, but look at this.
0:08:51 > 0:08:55- See?- It's losserly!
0:08:55 > 0:08:59- It's not doing anything.- It is, it's shiny. Look how shiny it is.
0:08:59 > 0:09:03- It's not shiny at all. - What do you think of that? That's your clouds, you see?
0:09:03 > 0:09:05It looks a lot like cotton wool.
0:09:05 > 0:09:08It may do, but clouds look like cotton wool.
0:09:08 > 0:09:10You see, we've brought the weather inside.
0:09:10 > 0:09:12- Oh, di.- It's still rubbish.
0:09:12 > 0:09:15SPEAKS CACTINIAN
0:09:15 > 0:09:19Actually, you know who's to blame for this fiasco. It's him.
0:09:19 > 0:09:22Because I had something very urgent to attend to
0:09:22 > 0:09:24and I left it all up to him. Yeah, he built it.
0:09:24 > 0:09:26I hate it as much as you.
0:09:26 > 0:09:27Kick it, kick it.
0:09:27 > 0:09:29Yes, it's rubbish!
0:09:29 > 0:09:31Don't you worry though.
0:09:31 > 0:09:35We won't rest until this invention is perfect.
0:09:35 > 0:09:40I was thinking, if you could only eat one type of cake for the rest of your life...
0:09:40 > 0:09:44- Ahem!- Oh!- How is this going to help my invention?
0:09:44 > 0:09:45Um...
0:09:45 > 0:09:47SPEAKS CACTINIAN
0:09:47 > 0:09:49Research, yes, into...sunshine.
0:09:49 > 0:09:53We were talking to the internet and he said this bright white sunlight
0:09:53 > 0:09:56- is made up of lots of different colours.- Oh.
0:09:56 > 0:09:59And when it hits things, some of the colours are absorbed
0:09:59 > 0:10:02- and some bounce back. You got that?- Yeah.
0:10:02 > 0:10:04- So you know our shiny ball?- Yes.
0:10:04 > 0:10:07- That was bouncing back green light, so it looked green.- Di.
0:10:07 > 0:10:10- You want your ball to bounce back white light, don't you?- Yes.
0:10:10 > 0:10:12So you get white lights dancing round the room.
0:10:12 > 0:10:17So we need to wrap your ball in something that doesn't absorb any light at all.
0:10:17 > 0:10:20So if we shine white light at it, we get white light back.
0:10:20 > 0:10:21SPEAKS CACTINIAN
0:10:21 > 0:10:24Makes sense, doesn't it? So what we have to do
0:10:24 > 0:10:28is find something shinier than our van, but not a colour.
0:10:28 > 0:10:30A mirror.
0:10:30 > 0:10:32Sorry, we're thinking.
0:10:32 > 0:10:33A mirror!
0:10:33 > 0:10:36Just a second. Shinier than our van but not a colour.
0:10:36 > 0:10:38Ed, a mirror!
0:10:38 > 0:10:40Molly, just play with these bananas.
0:10:40 > 0:10:42- Oh, I've got it.- Wha?
0:10:42 > 0:10:44No, it's gone again.
0:10:44 > 0:10:47- A mirror.- It's back! A mirror!
0:10:47 > 0:10:50- Oh, di!- I'm so clever sometimes, aren't I?
0:10:50 > 0:10:52SPEAKS CACTINIAN
0:10:52 > 0:10:54- We've got one in the back of the van?- Di.
0:10:54 > 0:10:56Oh, great. Good.
0:10:56 > 0:10:58- SPEAKS CACTINIAN - And it talks?- Mm.
0:10:58 > 0:11:02Of course it does. (It's best to humour him in these situations.)
0:11:02 > 0:11:05Let's go and find your talking mirror, mate.
0:11:08 > 0:11:10Oh, fair enough, there is a mirror in here.
0:11:10 > 0:11:11SPEAKS CACTINIAN
0:11:14 > 0:11:16SPEAKS CACTINIAN
0:11:16 > 0:11:18Got to wake it up? Right. Mirror, woo! Wake up!
0:11:18 > 0:11:24Mirror, mirror on the wall, who is the fairest of them all?
0:11:24 > 0:11:28Tennis umpires, of course. They're pretty fair, yeah.
0:11:28 > 0:11:31Then there's judges. Simon Cowell, yeah, he's very honest.
0:11:31 > 0:11:33Sometimes a bit too honest if you ask me.
0:11:33 > 0:11:36Fairest of them all, though. Tricky question.
0:11:36 > 0:11:38That wasn't what I wanted to ask you, Mirror.
0:11:38 > 0:11:41Then be very careful about asking important questions.
0:11:41 > 0:11:43You only get to ask me three questions
0:11:43 > 0:11:46- and you've already asked one, so you've only got two left.- Really?
0:11:46 > 0:11:49Yes. Now you've only got one left.
0:11:49 > 0:11:53Can we get on with this please? I've got a busy afternoon ahead of me.
0:11:53 > 0:11:57- No, you haven't. You just sit in the back of our van. - I've got some thinking to do.
0:11:57 > 0:12:00Reflecting, so to speak.
0:12:00 > 0:12:03That's what I need to talk to you about - reflecting light,
0:12:03 > 0:12:06because we're trying to build a Rainbow-a-go-go,
0:12:06 > 0:12:09and it needs to reflect light. Do you know about mirrors, Mirror?
0:12:09 > 0:12:13Yes. Sorry, that was your final question. Goodbye.
0:12:13 > 0:12:17- No, no, wait.- What?- Come on, we're desperate.
0:12:17 > 0:12:20OK, look. There's this girl called Danielle Darwin.
0:12:20 > 0:12:24She works on the make-up counter at the department store, surrounded by mirrors all day.
0:12:24 > 0:12:26Anyway, she might be able to help you.
0:12:26 > 0:12:30- Brilliant. I'll pop you back now. - Oh, thanks, and by the way Ed,
0:12:30 > 0:12:34- could you bring me a slice of cake? - Mirrors don't eat cake.
0:12:34 > 0:12:36They don't speak either, yet...here we are.
0:12:36 > 0:12:40- Fair enough, I suppose. I'll see what I can do.- Thanks.
0:12:42 > 0:12:44Right. Let's try down the department store.
0:12:44 > 0:12:47- Ed?- What?
0:12:48 > 0:12:49Oh.
0:12:49 > 0:12:52Yeah. I forgot our van was broken.
0:12:52 > 0:12:53Molly, come here.
0:12:53 > 0:12:57I don't suppose your dad would let us borrow his van, would he?
0:12:57 > 0:13:01I don't think so. But I might have something else.
0:13:03 > 0:13:04This is embarrassing.
0:13:05 > 0:13:06Hello, Danielle.
0:13:06 > 0:13:08Oh, hello!
0:13:08 > 0:13:10SPEAKS CACTINIAN
0:13:10 > 0:13:13- Who's strangely attractive? - Oh, bless!
0:13:13 > 0:13:16- What can I help you with, babes? - We need to find out about mirrors
0:13:16 > 0:13:18for a disco ball we're trying to make, and we thought
0:13:18 > 0:13:21since you work with mirrors, you might know about them.
0:13:21 > 0:13:25Oh, I do as it happens, partly from working here, and partly from my PhD
0:13:25 > 0:13:30- in light and reflective technologies from Kings College Oxford. - Oh, right.
0:13:30 > 0:13:32So how do mirrors work?
0:13:32 > 0:13:35All sources of light produce rays, and those rays
0:13:35 > 0:13:38bounce off things, like handbags and footballers and puppies.
0:13:38 > 0:13:41We learned all about light from the internet.
0:13:41 > 0:13:45Well, with most objects, like handbags and...
0:13:45 > 0:13:47- Footballers and puppies, yeah. - When the light hits them,
0:13:47 > 0:13:51it gets changed, and when it bounces into our eyes
0:13:51 > 0:13:54we see those changes as shape and texture.
0:13:54 > 0:13:57And colour. We learned about that as well.
0:13:57 > 0:14:00But there's some objects, like mirrors, that are so-o-o-o good
0:14:00 > 0:14:04at bouncing the light back, that it hardly changes at all.
0:14:04 > 0:14:07SPEAKS CACTINIAN
0:14:07 > 0:14:08Who's perfect?
0:14:08 > 0:14:13And if a light hits the mirror, right? So that's the mirror.
0:14:13 > 0:14:17If the light hits the mirror at this angle, yeah,
0:14:17 > 0:14:22then it bounces off, at the same angle, in a different direction,
0:14:22 > 0:14:25and if you move the mirror, the angle changes.
0:14:25 > 0:14:30- What's the best reflective thing to wrap round something ball-shaped? - I don't know. I never asked.
0:14:30 > 0:14:33Oh, well. Thanks for your help. Come on.
0:14:33 > 0:14:34Ed and Oucho's Excellent Inventions!
0:14:34 > 0:14:38- Molly, You're probably wondering why we brought you here.- Yeah.
0:14:38 > 0:14:41Danielle has got us up to speed with reflections,
0:14:41 > 0:14:44- so the big question is... - SPEAKS CACTINIAN
0:14:44 > 0:14:47Are we going to get our van fixed
0:14:47 > 0:14:50is a big question, but the bigger question is...
0:14:50 > 0:14:52SPEAKS CACTINIAN
0:14:52 > 0:14:54- Where is your elf costume?- Di.
0:14:54 > 0:14:56Oh yes, where has that gone?
0:14:56 > 0:14:58I really have no idea.
0:14:58 > 0:15:01Ha, ha, ha!
0:15:01 > 0:15:04No, no. The big question is what's the best way
0:15:04 > 0:15:07- to reflect light off a ball? Are you ready?- Yes.
0:15:07 > 0:15:11We have this spinny stick thing. We'll put the ball on there.
0:15:11 > 0:15:13These lights here...
0:15:13 > 0:15:16will hopefully get the light reflected off the balls really well.
0:15:16 > 0:15:18Oucho's in charge of turning off the main light.
0:15:18 > 0:15:21What are we testing? Water is reflective,
0:15:21 > 0:15:24so I thought maybe a ball soaked in water may be a way to go.
0:15:24 > 0:15:26Also, we have a Christmas bauble.
0:15:26 > 0:15:28That's shiny. Metal is reflective.
0:15:28 > 0:15:30I used this to wrap my sandwiches earlier.
0:15:30 > 0:15:32I haven't bothered cleaning it. It'll be fine.
0:15:32 > 0:15:35- Then this weird thing we knocked up.- It might work.
0:15:35 > 0:15:38Yeah, it's a couple of mirrors strapped to the side of ball.
0:15:38 > 0:15:40I'm not sure about it.
0:15:40 > 0:15:41- Shall we begin?- Yeah.
0:15:41 > 0:15:42Lovely.
0:15:43 > 0:15:45Oucho, turn off the lights.
0:15:45 > 0:15:47Lovely.
0:15:47 > 0:15:50- What do you think of that? - Well, it didn't reflect.
0:15:50 > 0:15:53SPEAKS CACTINIAN
0:15:53 > 0:15:55Let's give this a bit of a clean.
0:15:55 > 0:15:56Can't have a wet camera.
0:15:58 > 0:16:02- Right. Which one next?- That one with the ham and cheese in it.
0:16:02 > 0:16:05Good, good. Duff, back in there.
0:16:06 > 0:16:11Oh, dear. It's going everywhere already. Right...
0:16:11 > 0:16:13SPEAKS CACTINIAN
0:16:13 > 0:16:16Start spinning. Keep an eye on the lights.
0:16:19 > 0:16:21- Wasn't that impressive, was it?- No.
0:16:21 > 0:16:25Keep trashing this camera though. Probably don't need that.
0:16:25 > 0:16:28- What next?- The bauble, I think. It looks quite shiny.
0:16:28 > 0:16:31It does look quite shiny. Here we go.
0:16:36 > 0:16:39- What do you think?- Didn't do as well as I thought it would.
0:16:39 > 0:16:41No, it just glowed, didn't it?
0:16:41 > 0:16:44You didn't get those little lights. Do you want to stick that on, then?
0:16:46 > 0:16:48Lights off please, Oucho.
0:16:48 > 0:16:52OK. Five, four, three, two, one, go!
0:16:53 > 0:16:58It's reflecting off your face. And smashing into the camera as well.
0:16:58 > 0:17:01This poor camera. What do you think of that?
0:17:01 > 0:17:03Brilliant. I think it was the best.
0:17:03 > 0:17:07Yes, it was, wasn't it? That was really good.
0:17:07 > 0:17:10I think what we need to do is build a ball, 60ft high,
0:17:10 > 0:17:14with about 200 different mirrors all round it,
0:17:14 > 0:17:16then we'll have exactly what we need.
0:17:16 > 0:17:19Or we could just keep the ball the same size
0:17:19 > 0:17:21with lots of little mirrors.
0:17:21 > 0:17:24Yeah, yeah, we could do that as well. If you want.
0:17:28 > 0:17:32Mmm. I'm starting to think this carrot cake is all right actually.
0:17:32 > 0:17:35- And it's really made out of carrots? - Yes.
0:17:35 > 0:17:38- The people in charge of naming things are getting pretty lazy.- Di.
0:17:38 > 0:17:42- Next they'll tell us rainbows are made out of rain. - SPEAKS CACTINIAN
0:17:42 > 0:17:44We'd better find out what they're made out of
0:17:44 > 0:17:47otherwise we're not going to get paid.
0:17:47 > 0:17:49SPEAKS CACTINIAN
0:17:49 > 0:17:52- Yes, we'll be able to find the pot of gold and fix our van.- Di.
0:17:52 > 0:17:57That reminds me, I've got the price of the exhaust for your van.
0:17:57 > 0:17:58Oh great. Lovely. Thank you.
0:18:02 > 0:18:04SPEAKS CACTINIAN
0:18:04 > 0:18:06No, it isn't cheap, no.
0:18:08 > 0:18:12Big Cheese will be taking this out of our wages for...five years!
0:18:12 > 0:18:17- Nine years. - SPEAKS CACTINIAN
0:18:17 > 0:18:20It's all right. There must be somebody round here
0:18:20 > 0:18:22who knows how rainbows are made.
0:18:23 > 0:18:26Ed and Oucho's Excellent Inventions!
0:18:28 > 0:18:32- Now it's raining.- Psst!
0:18:32 > 0:18:33SPEAKS CACTINIAN
0:18:33 > 0:18:37There's a strange woman trying to talk to us. Avoid eye contact.
0:18:37 > 0:18:40I hear you're looking for...
0:18:40 > 0:18:43weather information.
0:18:43 > 0:18:45We were, but we're all right now, thanks.
0:18:45 > 0:18:48Well, maybe I can be of...
0:18:48 > 0:18:50assistance.
0:18:50 > 0:18:53Oh, I recognise you, you're that weather girl off the telly!
0:18:53 > 0:18:56- Shh! I'm in disguise.- Oh. Why?
0:18:56 > 0:19:01Them, they're everywhere and they don't want the public knowing too much information.
0:19:01 > 0:19:04- What, about weather information? - Exactly.
0:19:04 > 0:19:06Take rainbows, for example.
0:19:06 > 0:19:08Oh, we need to know about those.
0:19:08 > 0:19:10Rainbows are made out of light.
0:19:10 > 0:19:12In this case, sunlight.
0:19:12 > 0:19:16Light slows down when it hits a rain drop.
0:19:16 > 0:19:21- That's how rainbows are made?- Yes, something top secret happens
0:19:21 > 0:19:24- when light hits a rain drop.- What?
0:19:24 > 0:19:26It's called refraction.
0:19:26 > 0:19:27Oh, wow!
0:19:27 > 0:19:29What's refraction?
0:19:29 > 0:19:34Refraction happens when light slows down, hits a rain drop
0:19:34 > 0:19:38and allows us to see the separate colours that make up a light beam.
0:19:38 > 0:19:42Imagine the colours in a beam of light as a line of agents,
0:19:42 > 0:19:45running at the same speed in a line.
0:19:45 > 0:19:49When we view them front on, we see them in a line,
0:19:49 > 0:19:53but when we view them side on, we only see one agent.
0:19:53 > 0:19:56But what would happen if they hit a patch of mud?
0:19:56 > 0:19:59- SPEAKS CACTINIAN - The Government would catch them?
0:19:59 > 0:20:03No, they each slow down when they get to the mud.
0:20:03 > 0:20:04- Oh.- Oh.
0:20:05 > 0:20:08If the mud was at an angle, like the edge of a rain drop,
0:20:08 > 0:20:10one agent would come out of the mud first.
0:20:10 > 0:20:13He'd be back on the grass running fast,
0:20:13 > 0:20:16getting ahead of the other agents and we would see him clearly.
0:20:16 > 0:20:20Then the next one would come out and run off, and then the next one,
0:20:20 > 0:20:21then the next one and so on.
0:20:21 > 0:20:26As the line isn't straight any more, we can see each separate agent.
0:20:26 > 0:20:30This is what happens when white light passes through a rain drop.
0:20:30 > 0:20:34Rather than seeing the big group, which is white light,
0:20:34 > 0:20:38we see each individual colour that makes up a rainbow.
0:20:38 > 0:20:43That's fantastic. So water breaks the sunlight up into its separate colours.
0:20:43 > 0:20:44- Shh!- Sorry.
0:20:44 > 0:20:47That's right. And we call that refraction.
0:20:47 > 0:20:52Each rain drop is only creating a tiny piece of the rainbow,
0:20:52 > 0:20:54and the colours are being refracted
0:20:54 > 0:20:58all over the place, so you need hundreds and thousands of rain drops
0:20:58 > 0:21:02to shine at the same time, if you want to see a rainbow.
0:21:02 > 0:21:04That's great. Thank you very much.
0:21:04 > 0:21:07That's right. And tell no-one you've seen me.
0:21:07 > 0:21:09OK. Yeah. We haven't seen you.
0:21:11 > 0:21:13SPEAKS CACTINIAN
0:21:13 > 0:21:16Yeah, she was weird, wasn't she? Seems more normal on telly.
0:21:16 > 0:21:18- Anyway, we know about rainbows now. - Di.
0:21:18 > 0:21:20All we need is a big light and water. Simple.
0:21:27 > 0:21:28Oi!
0:21:28 > 0:21:30Argh!
0:21:31 > 0:21:34SPEAKS CACTINIAN
0:21:34 > 0:21:37Look, I told you, you can't be an elf again.
0:21:37 > 0:21:41That elf costume went missing... mysteriously.
0:21:41 > 0:21:43Ooh-ooh! Ha, ha, ha!
0:21:43 > 0:21:44Ooh-ooh!
0:21:44 > 0:21:48- Hi, guys. I've got some non-carrot based cake here. - SPEAKS CACTINIAN
0:21:48 > 0:21:51Lovely. We'll have that in a bit. We've got work to do first
0:21:51 > 0:21:55because, Molls, we're about to do the final test on your weather machine.
0:21:55 > 0:21:57Have a look at this. We have indoor sunlight
0:21:57 > 0:22:00- shining on this, your disco ball. - Brilliant.
0:22:00 > 0:22:03Also - you're going to love this bit - dada!
0:22:03 > 0:22:05- doughnut drawer!- Fantastic.
0:22:05 > 0:22:06- You peckish?- Yeah.
0:22:06 > 0:22:09Right. That's for later so you can't have any now.
0:22:09 > 0:22:13- Also, we have your music maker. What do you think?- It's not bad.
0:22:13 > 0:22:15Yeah, you're right, it is brilliant.
0:22:15 > 0:22:19We still have the final test and that's on this, the rainbow maker.
0:22:19 > 0:22:22It looks just like a bunch of hoses.
0:22:22 > 0:22:26It might look like that, but Oucho and I are trained professionals.
0:22:26 > 0:22:27We know what we're doing.
0:22:36 > 0:22:39OK. Ouch-meister, are you ready?
0:22:39 > 0:22:40SPEAKS CACTINIAN
0:22:40 > 0:22:42- Molly, you ready?- Yep.
0:22:42 > 0:22:44OK.
0:22:44 > 0:22:46One rainbow coming up.
0:22:49 > 0:22:52- Can you see the rainbow?- No.
0:22:52 > 0:22:54Can you see it? I can't see it.
0:22:54 > 0:22:55Argh!
0:23:00 > 0:23:05- Turn it off. Molly I can't see. I've got water in my eyes.- It's stuck.
0:23:05 > 0:23:08My television eyes!
0:23:11 > 0:23:13- Did you see the rainbow? - No, I didn't.
0:23:15 > 0:23:18Oh, you poor thing. Oh, you poor thing.
0:23:18 > 0:23:20Are you all right?
0:23:20 > 0:23:23Oh, no, it's ruined!
0:23:23 > 0:23:24Oh, you poor little cake.
0:23:24 > 0:23:26Wha?!
0:23:26 > 0:23:27SPEAKS CACTINIAN
0:23:27 > 0:23:29Let's get you dried off.
0:23:30 > 0:23:33SPEAKS CACTINIAN
0:23:33 > 0:23:35Well, I'm not going to lie to you, Molly.
0:23:35 > 0:23:37That didn't go exactly as planned.
0:23:37 > 0:23:41We all got wet, and that poor little cake died in vain.
0:23:42 > 0:23:47- It didn't really make a rainbow, either.- All right. Don't rub it in!
0:23:47 > 0:23:51In the Midlands there'll be rain hanging about for the next 24 hours.
0:23:51 > 0:23:54- Hang on a minute. That's it! - SPEAKS CACTINIAN
0:23:54 > 0:23:56No, not the Midlands, no.
0:23:56 > 0:23:57What did she say in the park?
0:23:57 > 0:24:02You need hundreds and thousands of rain drops to shine at the same time
0:24:02 > 0:24:04if you want to see a big rainbow.
0:24:04 > 0:24:07We haven't got enough rain drops!
0:24:07 > 0:24:10We need more to cover a wider area, then we'll get our rainbow.
0:24:10 > 0:24:11Let's make it a spray.
0:24:11 > 0:24:15- That's a brilliant idea. - SPEAKS CACTINIAN
0:24:15 > 0:24:17No, you definitely won't get wet this time.
0:24:17 > 0:24:19Come on, let's get building!
0:24:21 > 0:24:25# This week was frankly a very tough call
0:24:25 > 0:24:28# Oh, di
0:24:28 > 0:24:32# A weather machine with a built-in disco ball
0:24:32 > 0:24:34# Mm-hm
0:24:34 > 0:24:37# Molly's design was called the Rainbow-a-go-go
0:24:37 > 0:24:40# I have to admit I thought it was a no-no
0:24:40 > 0:24:43# The internet told us about colour and light
0:24:43 > 0:24:46# I was convinced we'd get our disco ball right
0:24:46 > 0:24:49# We got a green beach ball that was nice and bright
0:24:49 > 0:24:52# To say it was pathetic would be being polite
0:24:52 > 0:24:54# Reflection
0:24:54 > 0:24:57- # That's what we need Yeah, yeah- Di, di
0:24:57 > 0:25:01# Molly then suggested a mirror and me and Oucho agreed
0:25:03 > 0:25:08# Got a magic mirror from the back of the van
0:25:08 > 0:25:10# Mm-hm
0:25:10 > 0:25:13# It sent to us a woman who looked a bit like a man... #
0:25:13 > 0:25:14Ah, she's losserly.
0:25:14 > 0:25:18# She said light needs something shiny to reflect it
0:25:18 > 0:25:21# We tested different shiny things so we could perfect it
0:25:21 > 0:25:24# For our next question we asked our weather girl
0:25:24 > 0:25:27# She told us how rainbows were made, we gave it a whirl
0:25:27 > 0:25:30# Our rain was too heavy but we got the gist
0:25:30 > 0:25:33# All we need now is a fine water of mist
0:25:33 > 0:25:35# For refraction
0:25:35 > 0:25:39- # That's what we need Yeah, yeah- Di, di
0:25:39 > 0:25:41# And if we get this final test right
0:25:41 > 0:25:44# I'm pretty sure we'll succeed. #
0:25:45 > 0:25:48Molly, that wasn't the easiest invention we've made,
0:25:48 > 0:25:51- but it was a tall order. - SPEAKS CACTINIAN
0:25:51 > 0:25:54I wouldn't go as far as saying it was a living nightmare.
0:25:54 > 0:25:57- Anyway, shall we show everybody at home?- Yes.
0:25:57 > 0:26:01Molly asked us to make her a weather-making disco machine.
0:26:01 > 0:26:06The Rainbow-a-go-go. It had to provide food, music and rainbows.
0:26:06 > 0:26:08- Di.- And here it is!
0:26:11 > 0:26:13- No.- ha-ha-ha!- Not really.
0:26:13 > 0:26:16Not that useless, are we? No, here it is!
0:26:24 > 0:26:26- Look at that! A real live rainbow. - Ah!
0:26:26 > 0:26:29It's not much of a party without your friends, is it?
0:26:29 > 0:26:30Molly's friends!
0:26:30 > 0:26:32# Well, it's one for the money
0:26:32 > 0:26:33# Two for the show
0:26:33 > 0:26:36# Three to get ready Now go, cat, go
0:26:36 > 0:26:37# But don't you
0:26:37 > 0:26:39# Step on my blue suede shoes
0:26:40 > 0:26:44# Well, you can do anything But stay off of my blue suede shoes
0:26:44 > 0:26:45# Let's go, cats! #
0:26:57 > 0:26:59- How's it going, Molly?- Fantastic.
0:26:59 > 0:27:02- What's your favourite so far? - The rainbow worked well.- Yes.
0:27:02 > 0:27:04SPEAKS CACTINIAN
0:27:04 > 0:27:07He wants to find a pot of gold at the end of the rainbow
0:27:07 > 0:27:09so he can buy an exhaust for the van.
0:27:09 > 0:27:13See, I told you there was no such thing as the end of the rainbow.
0:27:13 > 0:27:16It's myth. It's a fairy tale, a load of made-up old bobbins,
0:27:16 > 0:27:20like the Loch Ness Monster or Sam and Mark's recording contract.
0:27:20 > 0:27:21SPEAKS CACTINIAN
0:27:21 > 0:27:24I don't think we'll ever be able to afford to fix our van.
0:27:24 > 0:27:26We may have made Molly's dreams come true,
0:27:26 > 0:27:29- but ours have been smashed to a million pieces.- Di.
0:27:29 > 0:27:31- Ow!- Wha? Wha?
0:27:31 > 0:27:35- As if wasn't bad enough, I just banged my shin on this.- Wha?
0:27:35 > 0:27:39Exhaust for a 1977 camper van.
0:27:39 > 0:27:40Ow!
0:27:40 > 0:27:44And this...box that says
0:27:44 > 0:27:47"Free camper van parts, please take."
0:27:47 > 0:27:50Come on, mate. It looks like we're walking from now on.
0:27:50 > 0:27:53SPEAKS CACTINIAN