0:00:02 > 0:00:05- Hello, I'm Bitz.- And I'm Bob.
0:00:05 > 0:00:07We love make-and-do.
0:00:07 > 0:00:11- And with a little bit of know-how... BOTH:- You can do it too!
0:00:11 > 0:00:12Let's go!
0:00:12 > 0:00:17# We can work it out
0:00:17 > 0:00:19# Ahhh
0:00:19 > 0:00:23# We can work it out
0:00:23 > 0:00:25# And we'll invent a way
0:00:25 > 0:00:29# Through ideas and play
0:00:29 > 0:00:31# We'll save the day. #
0:00:31 > 0:00:34- Bitz and Bob.- Bitz and Bob. - Bitz and Bob!
0:00:34 > 0:00:38Do you remember how we gave your castle a makeover, Bob?
0:00:38 > 0:00:40Er, no.
0:00:41 > 0:00:44We had to lift the toy room to the top of the tower.
0:00:44 > 0:00:46- ALL:- Uh-oh.
0:00:46 > 0:00:49Bevel is strong. Maybe he can do it.
0:00:49 > 0:00:52- Oh, no, he can't. - BEVEL GRUNTS
0:00:53 > 0:00:56Some things are too heavy to just pick up.
0:00:56 > 0:01:00- You can hurt yourself if you try. - Oh, it's too heavy.
0:01:00 > 0:01:05Engineering helps by building machines to save the day.
0:01:05 > 0:01:08Bob, you'll love this one.
0:01:08 > 0:01:11Whoa, lifting a car! Cool!
0:01:11 > 0:01:15We needed a machine to lift the toy room, didn't we, Bitz?
0:01:15 > 0:01:18You're right, Bob. Let's see how.
0:01:19 > 0:01:22It's time for a Bitz brain blitz.
0:01:23 > 0:01:26We need a really big lifter with
0:01:26 > 0:01:28a rope attached to the toy room.
0:01:29 > 0:01:31The toy room is heavy,
0:01:31 > 0:01:34so we'll need something a lot heavier than a few books,
0:01:34 > 0:01:38and if the weight is more than the weight of the toy room,
0:01:38 > 0:01:40it should go up.
0:01:40 > 0:01:44- Now it's your turn to try.- Woohoo!
0:01:45 > 0:01:50Cookies! Oh, yeah, they can make a cookie-vator.
0:01:52 > 0:01:56To make one cookie go smoothly all the way to the top, they'll need to
0:01:56 > 0:02:00put more cookies on the other side to make that side go down.
0:02:02 > 0:02:03Whoops!
0:02:04 > 0:02:06Let's watch that again!
0:02:08 > 0:02:09Whoa, that's way too many.
0:02:11 > 0:02:13It went too fast.
0:02:14 > 0:02:16Oh, well, have another go.
0:02:21 > 0:02:24That's it! Yay!
0:02:24 > 0:02:28Two cookies or three cookies are heavier than one,
0:02:28 > 0:02:31and the lighter side has gone up.
0:02:31 > 0:02:33- Yay!- Look, it's working!
0:02:33 > 0:02:37That's just like Bevel, Zip and Pop being heavier
0:02:37 > 0:02:40than the tower-top toy room, so they go down
0:02:40 > 0:02:42and the tower-top toy room lifts up.
0:02:44 > 0:02:47Next, we're going to make a see-saw.
0:02:47 > 0:02:51Take a strip of card, fold it into three
0:02:51 > 0:02:54and use sticky tape to make a triangle.
0:02:55 > 0:02:59Try balancing a ruler on the point of your triangle.
0:02:59 > 0:03:01It's tricky!
0:03:07 > 0:03:08You can play a game
0:03:08 > 0:03:12if you stick bottle-top cups to the end of your see-saw.
0:03:14 > 0:03:18Then find out what makes the green ball go the highest.
0:03:20 > 0:03:25Drop objects on the same spot from the same height each time.
0:03:25 > 0:03:28What makes the green ball jump the highest?
0:03:29 > 0:03:31THEY LAUGH
0:03:33 > 0:03:35That one's the heaviest one!
0:03:35 > 0:03:38Oh, yeah, let's see it again!
0:03:45 > 0:03:46Cool!
0:03:46 > 0:03:50That's it! Steam pink style!
0:03:50 > 0:03:54Keep engineering and inventing a way to save the day.
0:03:54 > 0:03:56- BOTH:- You can do it too!