0:00:02 > 0:00:04- Hello, I'm Bitz.- And I'm Bob.
0:00:05 > 0:00:07BOTH: We love making do.
0:00:07 > 0:00:10And with a little bit of know-how...
0:00:10 > 0:00:11BOTH: You can do it too!
0:00:11 > 0:00:12# Let's go!
0:00:12 > 0:00:18# We can work it out
0:00:18 > 0:00:23# I can work it out
0:00:23 > 0:00:26# We'll invent a way
0:00:26 > 0:00:28# Through ideas and play
0:00:28 > 0:00:31# Bitz and Bob will save the day
0:00:31 > 0:00:34# Bitz and Bob, Bitz and Bob, Bitz and Bob! #
0:00:34 > 0:00:37Bob, do you remember how we used engineering
0:00:37 > 0:00:41to get our treasure back from Pirate Bevelbeard?
0:00:41 > 0:00:43No, I've forgotten.
0:00:45 > 0:00:49We needed to find a way to get to the pirate ship quickly.
0:00:49 > 0:00:56One, two, three, padoing!
0:00:56 > 0:00:57Aww!
0:00:57 > 0:01:00Not far enough. We need more energy.
0:01:00 > 0:01:05When things are stretchy, they store energy if they're pulled or pressed,
0:01:05 > 0:01:06like this trampoline.
0:01:06 > 0:01:11And when the energy's released, the gymnast can go really high.
0:01:11 > 0:01:14We needed to use energy stored in our padoinga
0:01:14 > 0:01:17to get to the pirate ship, didn't we, Bitz?
0:01:17 > 0:01:21That's right! Let's have a look.
0:01:21 > 0:01:24Time for a Bitz Brain Blitz.
0:01:24 > 0:01:28When you stretch something springy,
0:01:28 > 0:01:31it stores energy until you let it go.
0:01:31 > 0:01:32Boing!
0:01:32 > 0:01:36The more you stretch it, the more energy it stores up.
0:01:36 > 0:01:39And more stretch gives a bigger boing!
0:01:39 > 0:01:43And if it's stretched far enough, there'll be enough energy
0:01:43 > 0:01:46to send something heavy, like me and Bob,
0:01:46 > 0:01:49all the way to the ship.
0:01:49 > 0:01:52- Now it's your turn to try.- Woohoo!
0:01:53 > 0:01:58Look, they've got elastic bands and hair bands, and they're stretchy,
0:01:58 > 0:02:01Just like our padoinga was, Bob.
0:02:01 > 0:02:05They're wearing safety glasses to protect their eyes.
0:02:05 > 0:02:07If they stretch the band back,
0:02:07 > 0:02:11they can store up energy to fire the paper balls.
0:02:11 > 0:02:13Point the band away from you!
0:02:13 > 0:02:15Oh, well! Have another go!
0:02:17 > 0:02:19Padoing safely!
0:02:21 > 0:02:24Ready, set, go!
0:02:27 > 0:02:30Ooh, yeah, let's see it again!
0:02:31 > 0:02:36That's so springy, like our island padoinga.
0:02:38 > 0:02:39That's it.
0:02:39 > 0:02:45BOTH: One, two, three, padoing!
0:02:45 > 0:02:47Woohoo!
0:02:47 > 0:02:48LAUGHTER
0:02:48 > 0:02:50Huh?
0:02:50 > 0:02:52- We did it!- Woohoo!
0:02:52 > 0:02:55Now we're going to make rubber band launchers
0:02:55 > 0:02:59to padoing paper balls different distances.
0:02:59 > 0:03:02You'll need some cardboard tubes of different sizes.
0:03:02 > 0:03:06The smaller one fits inside the big one.
0:03:06 > 0:03:11You also need two stretchy elastic bands and a pencil.
0:03:11 > 0:03:14Ask a grown-up to help you.
0:03:14 > 0:03:15Now let's play!
0:03:17 > 0:03:22Aim safely! Away from you and your friends.
0:03:22 > 0:03:25They're trying to get the paper balls into the bowls.
0:03:25 > 0:03:27It's tricky!
0:03:27 > 0:03:30You might need a few goes to get it right.
0:03:30 > 0:03:36They're using tape to mark how far they're pulling back their padoinga.
0:03:36 > 0:03:39Oh, too short!
0:03:39 > 0:03:44They'll have to pull it back further to create more energy.
0:03:44 > 0:03:47The paper balls go further when you pull it back more.
0:03:47 > 0:03:49Padoing!
0:03:50 > 0:03:53Woo! They did it!
0:03:53 > 0:03:56That's it! Steam pink style!
0:03:56 > 0:04:00Keep engineering and inventing a way to save the day!
0:04:00 > 0:04:02BOTH: You can do it too!