0:00:02 > 0:00:05- Hello, I'm Bitz.- And I'm Bob.
0:00:05 > 0:00:07- BOTH:- We love make and do.
0:00:07 > 0:00:10And, with a little bit of know-how...
0:00:10 > 0:00:11- BOTH:- You can do it too!
0:00:11 > 0:00:12Let's go!
0:00:12 > 0:00:16# We can work it out
0:00:16 > 0:00:18# Whoa, whoa, whoa, whoa
0:00:18 > 0:00:20# Ah, ah-ah, ah-ah
0:00:20 > 0:00:23# We 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 > 0:00:37Do you remember how we used engineering to help us
0:00:37 > 0:00:40wake up Princess Purl from the sleepy spell?
0:00:40 > 0:00:42It does seem to ring a bell.
0:00:45 > 0:00:49We had to lift the really heavy bell off the ground
0:00:49 > 0:00:52so we could ring it to wake Purl up.
0:00:54 > 0:00:56- Ah!- Ah!- Ah!
0:00:56 > 0:00:59Oh, this yarn isn't strong enough to lift the bell.
0:01:02 > 0:01:06Some things are really heavy, but engineers can help figure out the
0:01:06 > 0:01:11strength of ropes and cables needed to lift, move and hold heavy weight.
0:01:14 > 0:01:17- Now it's your turn to try.- Woohoo!
0:01:21 > 0:01:22Yarn is very strong
0:01:22 > 0:01:27but look what happens when you separate the strands.
0:01:27 > 0:01:29I don't believe it, Bitz.
0:01:29 > 0:01:32It breaks really easily.
0:01:32 > 0:01:36When strands are on their own, they're much weaker.
0:01:38 > 0:01:42But put them together and they're super-strong. It won't break.
0:01:42 > 0:01:45Hoo-yeah! That's great!
0:01:45 > 0:01:49We needed something super-strong to lift the bell.
0:01:49 > 0:01:52It's time for a Bitz Brain Blitz.
0:01:52 > 0:01:56We tried to lift the bell with one piece of yarn,
0:01:56 > 0:02:00but the bell was too heavy and the yarn wasn't strong enough.
0:02:00 > 0:02:04But if we use more lines of yarn to lift the bell,
0:02:04 > 0:02:08then the weight of the bell would be shared between them
0:02:08 > 0:02:10and the yarn won't break!
0:02:10 > 0:02:14If I twist it all together it would make a rope.
0:02:14 > 0:02:17A rope strong enough to lift up the bell.
0:02:17 > 0:02:20- Go, Bevel!- Ha-ha!
0:02:25 > 0:02:26Pull!
0:02:26 > 0:02:29THEY HEAVE
0:02:29 > 0:02:30Yes.
0:02:30 > 0:02:32BELL CHIMES
0:02:32 > 0:02:35PURL YAWNS
0:02:35 > 0:02:37Oh, my shining sequins!
0:02:37 > 0:02:40We did it!
0:02:40 > 0:02:44Next, we're going to make our own super-strong lifters.
0:02:44 > 0:02:48Look, we've got yarn, some bouncy balls to lift
0:02:48 > 0:02:51and a bucket to carry the load.
0:02:51 > 0:02:55When you've tied one strand of yarn to the bucket handle
0:02:55 > 0:02:59you can see how many balls you can lift in it.
0:02:59 > 0:03:00Whoops!
0:03:00 > 0:03:05One strand can't lift five bouncy balls in the bucket.
0:03:05 > 0:03:08Now we've tied two strands to the bucket.
0:03:08 > 0:03:11Five, six bouncy balls.
0:03:11 > 0:03:13It works!
0:03:13 > 0:03:16The weight of the bouncy balls is spread out between
0:03:16 > 0:03:20two strands of yarn, so they can lift more.
0:03:20 > 0:03:22I wonder what will happen
0:03:22 > 0:03:25if we twist two strands together like a rope?
0:03:25 > 0:03:29Wow, the twisted yarn lifts loads of bouncy balls.
0:03:29 > 0:03:33Let's try some more and a teddy bear too.
0:03:33 > 0:03:38Hoo-yeah, the twisted yarn is super-strong.
0:03:38 > 0:03:41- Looking good.- It works!
0:03:41 > 0:03:43Go, twisted yarn!
0:03:43 > 0:03:46Have fun testing how much you can lift
0:03:46 > 0:03:48with strands of yarn or cotton at home.
0:03:48 > 0:03:52That's it. Steam Pink Style!
0:03:52 > 0:03:56Keep engineering and inventing away to save the day.
0:03:56 > 0:03:58- BOTH:- You can do it too!