0:00:02 > 0:00:05I'm Joanna, and these are my friends Kirsten and Martin.
0:00:05 > 0:00:08- This is our clubhouse. - It's where we make stuff,
0:00:08 > 0:00:12- meet amazing people... - Learn quick tricks, super skills...
0:00:12 > 0:00:13And have a dance.
0:00:13 > 0:00:16- ALL:- We want you to come and join us, too!
0:00:16 > 0:00:18# Let's go!
0:00:18 > 0:00:21# The Let's Go Club
0:00:21 > 0:00:23# Let's go!
0:00:23 > 0:00:25# The Let's Go Club
0:00:25 > 0:00:27# There's lots to do for me and you
0:00:27 > 0:00:31# Everybody can join... #
0:00:32 > 0:00:34Let's go!
0:00:35 > 0:00:36# Get ready, get set
0:00:36 > 0:00:39# At the Let's Go Club
0:00:40 > 0:00:41# Are you ready?
0:00:41 > 0:00:45# Let's go at the Let's Go Club
0:00:45 > 0:00:49# We've got a lot of things going on at the Let's Go Club. #
0:00:49 > 0:00:51Let's go!
0:00:51 > 0:00:55Today in the clubhouse, we're getting terrific and scientific.
0:00:55 > 0:00:58Let's Goer Natasha shows us what it's like to be an inventor.
0:00:58 > 0:01:03We're going double-digital with facts about computers and robots.
0:01:03 > 0:01:06Our CBeebies friend Dr Ranj is in the clubhouse.
0:01:06 > 0:01:09And I'll be showing you an EGGcellent experiment -
0:01:09 > 0:01:11the egg drop.
0:01:11 > 0:01:13# Get ready, get set
0:01:13 > 0:01:14# At the Let's Go Club
0:01:16 > 0:01:17# Are you ready?
0:01:17 > 0:01:21# Let's go at the Let's Go Club
0:01:21 > 0:01:24# We've got a lot of things going on right here
0:01:24 > 0:01:26# So come on and have some fun
0:01:26 > 0:01:30# We've got a lot of things going on at the Let's Go Club. #
0:01:30 > 0:01:32Let's go!
0:01:37 > 0:01:39Let's go!
0:01:39 > 0:01:41Hi, my name is Natasha.
0:01:41 > 0:01:42I'm eight years old.
0:01:42 > 0:01:44This is my cat, Griselda.
0:01:44 > 0:01:46I have six cats altogether...
0:01:46 > 0:01:48THEY MEOW
0:01:49 > 0:01:53- ..and I love cuddling all of them. - GRISELDA PURRS
0:01:53 > 0:01:54MEOW!
0:01:54 > 0:01:57I love jumping high on my trampoline.
0:02:03 > 0:02:06I play the violin and the flute.
0:02:08 > 0:02:09SHE PLAYS GREENSLEEVES
0:02:13 > 0:02:16But there's one thing I really love - science.
0:02:19 > 0:02:23I really love doing experiments at home with my mum.
0:02:23 > 0:02:26Measuring, mixing, pouring,
0:02:26 > 0:02:29swirling, spurting and squirting.
0:02:31 > 0:02:34It's fun to watch the chemical reactions.
0:02:34 > 0:02:35SHE LAUGHS
0:02:39 > 0:02:42I want to be a marine biologist when I grow up.
0:02:42 > 0:02:46I love learning about animals.
0:02:46 > 0:02:50I love using my microscope to look at things up close.
0:02:56 > 0:02:58I also really like inventing.
0:03:00 > 0:03:05These are some of the things I've invented.
0:03:05 > 0:03:07What's this invention?
0:03:07 > 0:03:10- This is the pollen shoe.- OK.
0:03:10 > 0:03:13It helps bees because, if you step over flowers,
0:03:13 > 0:03:16the pollen goes onto the bottom of the shoe
0:03:16 > 0:03:18and when you walk it spreads the pollen.
0:03:18 > 0:03:21This is the nose scratcher.
0:03:21 > 0:03:23It's basically a ring
0:03:23 > 0:03:26and there's a little robot arm
0:03:26 > 0:03:29that goes up and scratches you on the nose.
0:03:29 > 0:03:32Sometimes, when you've got an itch in your nose
0:03:32 > 0:03:34and you itch it with your finger,
0:03:34 > 0:03:36it looks like you're picking your nose.
0:03:36 > 0:03:39People say, "Yuck, you're picking your nose,"
0:03:39 > 0:03:41but you're actually itching your nose,
0:03:41 > 0:03:44and it'll come up and itch your nose for you.
0:03:44 > 0:03:49- And no-one will know that you're really itching your nose?- Yeah.
0:03:49 > 0:03:50That's really clever.
0:03:53 > 0:03:56I like finding out how things work.
0:03:56 > 0:03:59Sometimes, I make robots with my mum.
0:03:59 > 0:04:02This is Lizzie - she's a robot lizard.
0:04:02 > 0:04:04- Let's see if it works.- Great.
0:04:07 > 0:04:09Look at what she can do.
0:04:15 > 0:04:17I love science.
0:04:17 > 0:04:18Bye-bye.
0:04:22 > 0:04:26Now then, Let's Goers, I bet your brains are buzzing with ideas.
0:04:26 > 0:04:30You know, I've always fancied invented something. Ta-da!
0:04:30 > 0:04:33May I present the round of applause stick?
0:04:33 > 0:04:34CLAP, CLAP!
0:04:34 > 0:04:36- CHEERING - Now, I can clap myself.
0:04:36 > 0:04:40Thank you. Thank you very much. That's enough of that.
0:04:40 > 0:04:42Now, take a look at this.
0:04:42 > 0:04:44It's time for an EGGcellent experiment -
0:04:44 > 0:04:46the egg drop challenge.
0:04:46 > 0:04:48For this, you will need an egg,
0:04:48 > 0:04:50a cardboard tube,
0:04:50 > 0:04:52a plastic cup with some water in it,
0:04:52 > 0:04:54and a non-breakable tray.
0:04:54 > 0:04:56So we take our cup of water.
0:04:56 > 0:05:00And we place our non-breakable tray over the top of it.
0:05:00 > 0:05:02And make sure it's in the middle.
0:05:02 > 0:05:06Then, we take a cardboard tube and put that on top, too.
0:05:06 > 0:05:09And that goes in the middle as well.
0:05:09 > 0:05:11Finally, we take our egg
0:05:11 > 0:05:13and we balance it very carefully
0:05:13 > 0:05:16on its side on top of the cardboard tube.
0:05:16 > 0:05:18OK, here comes the exciting bit.
0:05:18 > 0:05:20So I'm going to need an audience.
0:05:20 > 0:05:22Come on, guys!
0:05:22 > 0:05:25Hey, Willow, hey, Rowan, hey, Francesca.
0:05:25 > 0:05:27- How are we?- ALL:- Good.
0:05:27 > 0:05:30Now, I'm going to hold on to my cup
0:05:30 > 0:05:33very carefully and I'm going to give
0:05:33 > 0:05:36my tray a strong tap, but not too hard.
0:05:36 > 0:05:38And what should happen is
0:05:38 > 0:05:41my egg should fall into the water.
0:05:41 > 0:05:42Are you ready, guys?
0:05:42 > 0:05:44- ALL:- Yeah!
0:05:44 > 0:05:46One, two, three.
0:05:48 > 0:05:49ROWAN SQUEALS
0:05:49 > 0:05:51It landed in the water.
0:05:51 > 0:05:53It did land in the water.
0:05:53 > 0:05:56That's what I call an EGGcellent experiment.
0:05:56 > 0:05:58Let's see that again.
0:05:58 > 0:06:01When the tray is gone, there's nothing to hold the egg up.
0:06:01 > 0:06:04Gravity pulled it down into the water.
0:06:04 > 0:06:06I think I deserve a round of applause.
0:06:06 > 0:06:09- CHEERING - "Well done, Kirsten."
0:06:09 > 0:06:11Thank you. "You're welcome, Kirsten."
0:06:11 > 0:06:14Do you dare to take on the daring egg drop challenge?
0:06:14 > 0:06:17If you do, remember to ask a grown-up first,
0:06:17 > 0:06:19because it could get messy.
0:06:19 > 0:06:23Make sure you send us your sciencey photos and videos as well.
0:06:23 > 0:06:25Now, speaking of science,
0:06:25 > 0:06:29it's time for some fun facts about robots and computers.
0:06:30 > 0:06:32Let's go!
0:06:32 > 0:06:35First up, one of the first-ever
0:06:35 > 0:06:37robots was a steam-powered pigeon.
0:06:37 > 0:06:40What a lot of hot air.
0:06:40 > 0:06:43A clever man from Greece called Archytas
0:06:43 > 0:06:46wanted to learn more about how birds fly.
0:06:46 > 0:06:48So he built a robo-bird.
0:06:48 > 0:06:53The robot pigeon could fly the length of two football pitches.
0:06:53 > 0:06:55The only problem was that,
0:06:55 > 0:06:57once it landed, the pigeon
0:06:57 > 0:07:00couldn't take off again to fly home.
0:07:00 > 0:07:02It had run out of steam.
0:07:02 > 0:07:03ROBOT PIGEON CHEEPS
0:07:03 > 0:07:07Next, the very first computer was heavier than an elephant.
0:07:07 > 0:07:09That's a weighty fact.
0:07:09 > 0:07:13The computer was Colossus and was as big as a bus.
0:07:13 > 0:07:14BEEP, BEEP!
0:07:14 > 0:07:19But only a few people knew about Colossus because it did
0:07:19 > 0:07:23top-secret jobs - cracking codes and finding out spy information.
0:07:23 > 0:07:26- Sh!- WHISPERS:- Don't tell anyone.
0:07:26 > 0:07:29Next, there are robots on the planet Mars.
0:07:29 > 0:07:32That is out of this world.
0:07:32 > 0:07:35The robots are called Mars rovers and took months
0:07:35 > 0:07:39and months to get to the Red Planet.
0:07:39 > 0:07:42Their job is to do experiments so that we can learn
0:07:42 > 0:07:47more about Mars and find out if anything lives there.
0:07:47 > 0:07:49Just one problem - no-one has
0:07:49 > 0:07:52worked out a way to get the robots back,
0:07:52 > 0:07:55so they are stuck on another world forever.
0:07:55 > 0:07:58It's a good job robots don't get lonely.
0:07:58 > 0:08:03And, finally, in South Africa, traffic lights are called robots.
0:08:03 > 0:08:05Let's put the brakes on.
0:08:05 > 0:08:09Back in the olden days, policemen organised the traffic,
0:08:09 > 0:08:13telling cars when to stop and when to go using hand signals.
0:08:13 > 0:08:16Then, electric traffic lights were invented.
0:08:16 > 0:08:19They replaced the real policeman
0:08:19 > 0:08:23so people started calling the lights robot policeman.
0:08:23 > 0:08:27And, over time, this name was shortened to just robots.
0:08:27 > 0:08:30That's red, amber and green for go-bot.
0:08:30 > 0:08:31Fact.
0:08:35 > 0:08:36Let's go!
0:08:36 > 0:08:39Techno-tastic facts right there.
0:08:39 > 0:08:41A steam-powered pigeon? What a hoot!
0:08:41 > 0:08:45Or would that be an owl? Anyway, we've been finding out
0:08:45 > 0:08:49- lots of cool facts today in the clubhouse, haven't we? ALL:- Yeah.
0:08:49 > 0:08:52Now, there's a doctor in the house. It's Dr Ranj!
0:08:52 > 0:08:54- Hey.- Hi, guys. Am I right in thinking
0:08:54 > 0:08:57that you've got some questions for me?
0:08:57 > 0:08:59We have been having a bit of a think.
0:08:59 > 0:09:01Harriet, you had a good question.
0:09:01 > 0:09:04Why do people sneeze when they have hay fever?
0:09:04 > 0:09:07Brilliant question, Harriet. After the winter,
0:09:07 > 0:09:10when all the plants and flowers are growing again,
0:09:10 > 0:09:12they release pollen into the air.
0:09:12 > 0:09:15Usually, that pollen doesn't cause problems.
0:09:15 > 0:09:18For some, it gets into their eyes, nose and mouth,
0:09:18 > 0:09:21and tickles. That's what makes you sneeze.
0:09:21 > 0:09:25- That is hay fever.- Wow.- Have you got a question as well, Scarlett?
0:09:25 > 0:09:29Why do people wear plaster casts when they break a bone?
0:09:29 > 0:09:32Your bodies are amazing. When you break a bone,
0:09:32 > 0:09:34your body can mend it again.
0:09:34 > 0:09:37It's a bit like two pieces of a broken plate -
0:09:37 > 0:09:41you glue them back together, that's what your body does.
0:09:41 > 0:09:44Because it takes such a long time, it's got to hold them
0:09:44 > 0:09:48there for a long time. That's what the plaster cast does -
0:09:48 > 0:09:52it holds them together so they glue together in the right way.
0:09:52 > 0:09:54Isla, did you have a question?
0:09:54 > 0:09:57- How small are germs? How do they make you ill?- Oh, wow.
0:09:57 > 0:10:01Well, germs are tiny. Smaller than the eyes can see.
0:10:01 > 0:10:03There's two types of germ, mainly -
0:10:03 > 0:10:07something called bacteria and something called viruses.
0:10:07 > 0:10:10They're everywhere, all around us, and some are inside us.
0:10:10 > 0:10:14The good germs live inside us and on our skin. They help us,
0:10:14 > 0:10:16and the bad germs make us poorly.
0:10:16 > 0:10:19When a bad germ gets inside our body, it gives us
0:10:19 > 0:10:23something called an infection, and that's what makes us sick.
0:10:23 > 0:10:26Our bodies are really good at fighting them off.
0:10:26 > 0:10:28Sometimes, we need medicine to help us.
0:10:28 > 0:10:30Dr Ranj, I've got a question.
0:10:30 > 0:10:34This little bone in your elbow, when you hit it and it feels funny?
0:10:34 > 0:10:38Why is it called a funny bone? Why's it feel like that?
0:10:38 > 0:10:41A funny question, because that isn't even a bone.
0:10:41 > 0:10:44We call it a funny bone because there's a nerve that runs
0:10:44 > 0:10:47down there. When you hit that part, it's actually
0:10:47 > 0:10:51the nerve you hit, and that's what makes it go weird and numb.
0:10:51 > 0:10:55And makes you feel funny. But it's not the bone, it's a nerve.
0:10:55 > 0:10:57- Interesting fact, isn't it? - I had nooo idea.
0:10:57 > 0:11:00I had no idea. That was really great.
0:11:00 > 0:11:02I feel like I've learnt something.
0:11:02 > 0:11:04I know a lot more than I did
0:11:04 > 0:11:06when I was eating my breakfast this morning.
0:11:06 > 0:11:09They were some great questions, Let's Goers.
0:11:09 > 0:11:13- Thanks for having me in your clubhouse.- Oh, it's a pleasure.
0:11:13 > 0:11:15Now, I've got a fact for YOU.
0:11:15 > 0:11:18Did you know that you can use two books to have a tug-of-war?
0:11:18 > 0:11:20No, I didn't!
0:11:20 > 0:11:23Well, prepare to be amazed, because it's time for We Did This
0:11:23 > 0:11:26with some science-loving Let's Goers.
0:11:26 > 0:11:28# The Let's Go Club. #
0:11:28 > 0:11:30Let's go!
0:11:30 > 0:11:32Hi, I'm Subal, and these are
0:11:32 > 0:11:34my friends Olivia, Billy and Sophia.
0:11:34 > 0:11:38We love science, and today we're going to do some experiments.
0:11:38 > 0:11:41Today, we're going to learn about friction.
0:11:41 > 0:11:45Friction is the force between two surfaces that are sliding.
0:11:45 > 0:11:47Or trying to slide across each other.
0:11:47 > 0:11:50When things are smooth, there's less friction.
0:11:50 > 0:11:53When things are rough, there's more friction.
0:11:53 > 0:11:55Go!
0:11:55 > 0:11:57Friction has slowed this car down
0:11:57 > 0:12:00because it's on a bumpy surface.
0:12:00 > 0:12:02Sometimes, the force of the friction
0:12:02 > 0:12:05is so big you can stop something
0:12:05 > 0:12:07moving altogether.
0:12:07 > 0:12:09Which is what happened next.
0:12:09 > 0:12:12We are layering the pages to see how many
0:12:12 > 0:12:14we could stuck together
0:12:14 > 0:12:17before they get too hard to separate.
0:12:17 > 0:12:20If you pull it apart like that,
0:12:20 > 0:12:24it is quite easy, isn't it, because there's not much friction?
0:12:24 > 0:12:27More pages on. 19...and 20.
0:12:27 > 0:12:29OK, try and pull it apart.
0:12:29 > 0:12:31Pull them really hard.
0:12:31 > 0:12:34When all the friction is added together from lots
0:12:34 > 0:12:38of different pages, it is very hard to separate them.
0:12:38 > 0:12:40We can't pull apart these books.
0:12:40 > 0:12:44We need to super-size this experiment and get some help.
0:12:44 > 0:12:45Just like the notebooks,
0:12:45 > 0:12:48these catalogues are attached
0:12:48 > 0:12:50together only by their pages.
0:12:50 > 0:12:53Three, two, one. Go!
0:12:53 > 0:12:56We are going to try and pull them apart.
0:13:01 > 0:13:03All those little bits of friction
0:13:03 > 0:13:06between the papers add up to lots of friction.
0:13:06 > 0:13:09Stop! Friction wins!
0:13:09 > 0:13:11We love science, and We Did This.
0:13:13 > 0:13:16- # The Let's Go Club. # - Let's go!
0:13:16 > 0:13:20There you have it - science fact, not science fiction.
0:13:20 > 0:13:22I'll never look at a book the same way again.
0:13:22 > 0:13:24The appliance of science.
0:13:24 > 0:13:27It's the Club Dance. We love doing this.
0:13:27 > 0:13:29You can join in, too.
0:13:29 > 0:13:32We know you've got some really Cool Moves
0:13:32 > 0:13:34you're going to want to show off.
0:13:34 > 0:13:37- FUNKY MUSIC PLAYS ALL:- Let's go!- Side to side.
0:13:42 > 0:13:44Jump.
0:13:47 > 0:13:51# Go, go, go Everybody dance now... #
0:13:51 > 0:13:52Roll.
0:13:55 > 0:13:59# Go, go, go Everybody dance... #
0:13:59 > 0:14:03Let's get our little friends in. Let's go, Let's Goers.
0:14:03 > 0:14:05- Let's get them in.- Come on!- Come on!
0:14:05 > 0:14:08Come on!
0:14:08 > 0:14:10Side to side.
0:14:10 > 0:14:13- Let's see what you got, Let's Goers. - Let's go!
0:14:13 > 0:14:16# Go, go, go Everybody dance... #
0:14:16 > 0:14:18Jump.
0:14:18 > 0:14:21- Oh, yeah, lovin' those moves. - Let's go!
0:14:21 > 0:14:24# Go, go, go Everybody dance... #
0:14:24 > 0:14:26Roll!
0:14:28 > 0:14:30Don't forget our Cool Move.
0:14:30 > 0:14:32# Everybody dance now
0:14:37 > 0:14:40# Go, go, go, go Everybody dance. #
0:14:40 > 0:14:42That's all for today.
0:14:42 > 0:14:45Remember, you can stay in the clubhouse
0:14:45 > 0:14:47by heading to the CBeebies website.
0:14:47 > 0:14:50Grab a grown-up, click on the Let's Go Club.
0:14:50 > 0:14:53Send us your photos, videos and messages.
0:14:53 > 0:14:57Remember, we're the club that never closes.
0:14:58 > 0:14:59- ALL:- Bye!