0:00:05 > 0:00:08# If you've got a question and you don't know where to go
0:00:08 > 0:00:11# Ask Nina for some help, cos she's got a science show
0:00:11 > 0:00:14# She makes sense of her senses While helping all her fans
0:00:14 > 0:00:17# By doing her experiments with potions and with bangs
0:00:17 > 0:00:19- # Touch your tongue - Tongue!
0:00:19 > 0:00:20- # Fingers - Fingers!
0:00:20 > 0:00:23- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:23 > 0:00:26# Nina and the Neurons find out what you need to know
0:00:26 > 0:00:29# Nina and the Neurons find out what you need to know
0:00:29 > 0:00:32# Luke, he helps us with our eyes and Felix with our touch
0:00:32 > 0:00:35# Ollie sniffs out smells And Belle, she hears so much
0:00:35 > 0:00:38# Bud is Ollie's brother, he helps us with our taste
0:00:38 > 0:00:41# They're Nina's little neurons And they're coming to your place!
0:00:41 > 0:00:43- # Touch your tongue - Tongue!
0:00:43 > 0:00:44- # Fingers - Fingers!
0:00:44 > 0:00:47- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:47 > 0:00:50# Nina and the Neurons find out what you need to know
0:00:50 > 0:00:53# Nina and the Neurons find out what you need to know
0:00:53 > 0:00:54# Oh yeah! #
0:00:57 > 0:00:58Oh! Hello!
0:00:58 > 0:01:02Mission accomplished. I've opened a tub of baking powder
0:01:02 > 0:01:04ready for my experiment.
0:01:05 > 0:01:08BEEPING
0:01:09 > 0:01:13I hear a beep, I see a flash, I wonder what they're going to ask.
0:01:20 > 0:01:23- ALL:- Hi, Nina. - Hi, guys!
0:01:23 > 0:01:25We've got a question for you.
0:01:25 > 0:01:27How do handles open doors?
0:01:27 > 0:01:31That's a great question. How do handles open doors?
0:01:31 > 0:01:33Door handles are brilliant.
0:01:33 > 0:01:37Come down to my workshop and we'll check it out.
0:01:37 > 0:01:38- ALL:- Bye!
0:01:38 > 0:01:40Bye.
0:01:40 > 0:01:44I'll need some help to answer this one and I know who to ask.
0:01:44 > 0:01:46OK, Neurons, time to get to work.
0:02:03 > 0:02:06- ALL:- Neurons at the ready, Nina.
0:02:07 > 0:02:11OK, today's question is, how do handles open doors?
0:02:11 > 0:02:15Which Neuron do you think'll be most useful?
0:02:15 > 0:02:17- ALL:- Me!
0:02:18 > 0:02:20Will it be...fabulous Felix?
0:02:20 > 0:02:24I can help so very much if you need the sense of touch.
0:02:24 > 0:02:27Will it be...beautiful Belle?
0:02:27 > 0:02:31I send messages to brain from ear if there's a sound I'll help you hear.
0:02:31 > 0:02:33Will it be...lovely Luke?
0:02:33 > 0:02:37For looking and seeing, day or night, I'll help you with your sight.
0:02:37 > 0:02:40Will it be...awesome Ollie?
0:02:40 > 0:02:44If it's pongy or whiffy but you can't tell, my messages help you smell.
0:02:44 > 0:02:46Will it be...baby Bud?
0:02:46 > 0:02:51Sour, salty, bitter or sweet, I'm your taste buddy whenever you eat.
0:02:51 > 0:02:53BEEPING
0:02:55 > 0:02:58- Oh!- It's Felix. - CHEERING
0:02:58 > 0:03:02- ALL:- Go, Felix. Go, Felix. Go, Felix. Go, Felix. Go, Felix.
0:03:02 > 0:03:05Go, Felix. Go, Felix.
0:03:05 > 0:03:09Marvellous. A little touch can mean so much, Nina.
0:03:09 > 0:03:12Today's question is, how do handles open doors?
0:03:12 > 0:03:16As they're something we need to touch to move,
0:03:16 > 0:03:17Felix will be helping us,
0:03:17 > 0:03:22but stand by, Luke, they're could be interesting things to look at too.
0:03:22 > 0:03:26At your service, Nina. Here's looking at you.
0:03:26 > 0:03:31Right, I need to get the workshop ready before the inventors arrive.
0:03:32 > 0:03:36Joe, Callum and Harris want to find out about door handles -
0:03:36 > 0:03:40new handles, old, bright and shiny gold handles.
0:03:40 > 0:03:42So today, for one day only,
0:03:42 > 0:03:46Joe, Callum and Harris become the inventors!
0:03:49 > 0:03:50Hi, guys!
0:03:50 > 0:03:52- ALL:- Hi, Nina. - Come on in.
0:03:52 > 0:03:55Your question was, how do handles open doors?
0:03:55 > 0:03:58Why do you want to know that?
0:03:58 > 0:04:01One of our door handles is broken and we can't open it.
0:04:01 > 0:04:06I have a door handle over here and a very special door.
0:04:07 > 0:04:10Whoo!
0:04:10 > 0:04:12Come through my special door.
0:04:13 > 0:04:15Let's have a closer look.
0:04:15 > 0:04:19When you push the handle down the latch disappears
0:04:19 > 0:04:23and it's so we can open the door.
0:04:23 > 0:04:25When we let the handle back up -
0:04:25 > 0:04:29the latch comes out again, which keeps the door shut.
0:04:30 > 0:04:33We know what a door handle does, but how does it do it?
0:04:33 > 0:04:36We should get inside and have a look.
0:04:38 > 0:04:42So this is the inside of a door handle.
0:04:42 > 0:04:45Let's watch what happens when we turn this handle.
0:04:47 > 0:04:48Do you see that?
0:04:48 > 0:04:51There's a square bit of metal
0:04:51 > 0:04:54and when you push the handle down, it turns
0:04:54 > 0:04:56and the latch comes in,
0:04:56 > 0:05:00so we can open the door just like the door over there.
0:05:00 > 0:05:03What would happen if it didn't have a handle?
0:05:03 > 0:05:06- Will we take the handle off?- Yes.
0:05:06 > 0:05:10Taking things apart is my job - so don't do this yourself.
0:05:10 > 0:05:14That's right. Nina's been specially trained to do this.
0:05:14 > 0:05:19If YOU take things apart you may not be able to put them together again
0:05:19 > 0:05:21and they'll be broken.
0:05:22 > 0:05:26Now...how are we going to turn the axle to open the latch?
0:05:26 > 0:05:29- We could use our fingers. - Oh, good thinking.
0:05:29 > 0:05:31Be careful. On you go.
0:05:35 > 0:05:40Oh, Nina, fingers are for playing the piano or painting pictures
0:05:40 > 0:05:44not for - oh - sticking in door handles.
0:05:44 > 0:05:45You're right, Felix.
0:05:45 > 0:05:49We might as well put the handle back on.
0:05:49 > 0:05:50Harris, try now.
0:05:52 > 0:05:55It's much easier with the door handle.
0:05:55 > 0:05:59That's because a door handle is something called a "lever".
0:05:59 > 0:06:02A lever makes moving things much easier.
0:06:02 > 0:06:05I know lots of inventions that use levers.
0:06:05 > 0:06:09- Shall we see another invention? - ALL:- Yes!
0:06:09 > 0:06:11Brilliant. Let's go!
0:06:16 > 0:06:17Off they go.
0:06:17 > 0:06:20I really enjoy seeing the big inventions.
0:06:20 > 0:06:24What big things use levers?
0:06:24 > 0:06:26Think, think, think.
0:06:26 > 0:06:30Oh, look, this may give us a clue.
0:06:30 > 0:06:33No, still can't guess.
0:06:33 > 0:06:38Somewhere around here is something very exciting that uses levers.
0:06:38 > 0:06:39Can you see it yet?
0:06:39 > 0:06:42HORN TOOTS
0:06:44 > 0:06:45- ALL:- Wow!
0:06:49 > 0:06:51Ah! Yeah!
0:06:51 > 0:06:56It's a really big...thingamajiggy!
0:06:56 > 0:06:59That thingamajiggy, Bud, is called a digger.
0:06:59 > 0:07:04Diggers dig and lift and move things from place to place.
0:07:04 > 0:07:07Do you see the long bits? They work like levers.
0:07:07 > 0:07:11They make it easier for the digger to move heavy things.
0:07:11 > 0:07:15- Those levers are bigger than the door handle.- They are.
0:07:15 > 0:07:19Look at this tipper truck - it uses levers too.
0:07:19 > 0:07:24The lever helps lift the box and empty everything out.
0:07:24 > 0:07:26Who fancies driving it then?
0:07:26 > 0:07:27- ALL:- Me! Me!
0:07:29 > 0:07:32We've come to a special place to drive the trucks
0:07:32 > 0:07:35where experts are watching us.
0:07:35 > 0:07:39This isn't something you're normally allowed to do.
0:07:55 > 0:07:58So, now we know more about levers,
0:07:58 > 0:08:02we need to go to the workshop and get inventing. Let's go!
0:08:04 > 0:08:07Well, there's an awful lot of levering going on.
0:08:07 > 0:08:10But who invented the door handle?
0:08:10 > 0:08:13Oh! Oh! I know that.
0:08:14 > 0:08:16For a long, long time
0:08:16 > 0:08:19people had been trying lots of different ways to keep a door shut...
0:08:20 > 0:08:22DOOR CREAKS
0:08:35 > 0:08:39..until a man called Osbourn Dorsey had an idea.
0:08:39 > 0:08:41He drew how a door handle would work.
0:08:44 > 0:08:46Then he made it.
0:08:46 > 0:08:50His invention was easy to use and did the job perfectly.
0:08:50 > 0:08:52Well done, Mr Dorsey.
0:09:00 > 0:09:03Your question was, how do handles open doors?
0:09:03 > 0:09:06We've found out that a handle is a lever
0:09:06 > 0:09:09and it moves a latch which opens the door.
0:09:09 > 0:09:13Levers are useful for moving heavy things easily.
0:09:13 > 0:09:16That's why diggers and tippers use levers.
0:09:16 > 0:09:19We should invent our own door handles.
0:09:19 > 0:09:25The first thing we'll do is pick up your shapes and let's cut them out.
0:09:33 > 0:09:39And next we're going to stick all our shapes down onto the cardboard
0:09:39 > 0:09:41using your glue.
0:09:41 > 0:09:43Watch out for that sticky glue, Nina!
0:09:43 > 0:09:46Don't want to get it all over your fingers. Yuck!
0:09:52 > 0:09:56Next, guys, we're going to cut out these shapes.
0:10:00 > 0:10:02That's a lot of pieces.
0:10:02 > 0:10:05I wonder how they'll make them into a door handle.
0:10:05 > 0:10:08Next, we'll take our brown shapes,
0:10:08 > 0:10:11take the paper fastener, slip it through.
0:10:11 > 0:10:14Keep your fingers well out of the way.
0:10:14 > 0:10:19Next, we're going to line it up once you're happy with the position.
0:10:19 > 0:10:23Then gently push the paper fastener through.
0:10:23 > 0:10:24Once it's through,
0:10:24 > 0:10:29turn it around and open up the arms of the paper fastener
0:10:29 > 0:10:32to keep it in position.
0:10:32 > 0:10:36Next, take your yellow shape and it'll fit perfectly
0:10:36 > 0:10:39with the markings there on your door handle plan.
0:10:39 > 0:10:42You can slip it underneath D.
0:10:42 > 0:10:44We can do the same
0:10:44 > 0:10:46for this strip as we did for D.
0:10:46 > 0:10:50Now, guys, we can fix these pieces on.
0:10:50 > 0:10:52Push the paper fastener through.
0:10:52 > 0:10:55Well done.
0:10:55 > 0:10:58Lastly, we can take our door handles
0:10:58 > 0:11:02and give it a nice push so they're firmly together.
0:11:02 > 0:11:05Pop it through the hole. There we go.
0:11:05 > 0:11:08Guys, look, our door handle is made.
0:11:08 > 0:11:11Let me try my door handle with this door.
0:11:11 > 0:11:14Let me try and open the door.
0:11:14 > 0:11:18Oh, no! The door's not opening.
0:11:18 > 0:11:20You need to open the latch first.
0:11:20 > 0:11:22Oh, of course! Let's see if it works.
0:11:22 > 0:11:24Turn the handle
0:11:24 > 0:11:26and open the door.
0:11:27 > 0:11:29Hello, Nina!
0:11:29 > 0:11:30- ALL:- Hi, Nina!
0:11:30 > 0:11:33It works. When we turn the handle
0:11:33 > 0:11:35it moves the latch in
0:11:35 > 0:11:37and we can open the door. Hey!
0:11:37 > 0:11:42Well done, inventors, we've made our very own door handle.
0:11:45 > 0:11:48Your question was, how do handles open doors?
0:11:48 > 0:11:50I think we've answered it.
0:11:50 > 0:11:54First, we found that inside a door handle is a latch
0:11:54 > 0:11:58that has to come in and out to allow us to open and close a door.
0:11:58 > 0:12:02Without a handle, it's hard to do, but with one, it's easy.
0:12:02 > 0:12:05This is because a door handle is a lever
0:12:05 > 0:12:09and a lever makes moving heavy things really easy.
0:12:09 > 0:12:12That's how handles open doors.
0:12:12 > 0:12:16- Thanks for your great question today.- Thanks, Nina. Bye!
0:12:16 > 0:12:17Bye, guys.
0:12:23 > 0:12:26If you want to make today's invention go to
0:12:26 > 0:12:29the Nina section on the CBeebies website
0:12:29 > 0:12:34and you can make your very own or you may have other ideas.
0:12:35 > 0:12:38- Bikes!- Planes!- Binoculars!
0:12:38 > 0:12:41- Televisions!- Speakers!- And cars!
0:12:41 > 0:12:44# We all love inventing
0:12:44 > 0:12:47# Whoa, love inventing!
0:12:47 > 0:12:50# We all love inventing
0:12:50 > 0:12:53# Why don't you try it too?
0:12:53 > 0:12:56# Inventions make life easier
0:12:56 > 0:12:59- # And help us get things done - Go inventing!
0:12:59 > 0:13:04# I always like to take a look at how they work and run
0:13:04 > 0:13:05# Go inventing!
0:13:05 > 0:13:11- # We all love inventing - Whoa, go inventing!
0:13:11 > 0:13:17# We all love inventing Why don't you try it too? #
0:13:17 > 0:13:21It's been such a great day, man!
0:13:21 > 0:13:25I loved seeing those handles opening and closing doors.
0:13:25 > 0:13:28Door handles are a really cool invention.
0:13:28 > 0:13:30It's been a marvellous day.
0:13:30 > 0:13:34Seeing inside the door handle was such a treat.
0:13:34 > 0:13:36I've had a fabby day.
0:13:36 > 0:13:41Especially when they all went out and had fun.
0:13:41 > 0:13:43I really enjoyed myself today.
0:13:43 > 0:13:46The cardboard door handle was fun
0:13:46 > 0:13:51especially when the door popped open and we saw Nina behind it. He-he!
0:13:51 > 0:13:55Our day's been bursting with inventions.
0:13:55 > 0:14:00- I hope you've enjoyed it! See you again soon! Bye!- Bye!