Princess Purl's Big Sleep Bitz & Bob


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Princess Purl's Big Sleep

Engineering challenges for children. Teddy gets a lift today as our friends make superstrong lifters!


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Transcript


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-Hello, I'm Bitz.

-And I'm Bob.

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-BOTH:

-We love make and do.

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And, with a little bit of know-how...

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-BOTH:

-You can do it too!

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Let's go!

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# We can work it out

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# Whoa, whoa, whoa, whoa

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# Ah, ah-ah, ah-ah

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# We can work it out

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# We'll invent a way

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# Through ideas and play

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# Bitz and Bob will save the day

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# Bitz and Bob, Bitz and Bob, Bitz and Bob! #

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Do you remember how we used engineering to help us

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wake up Princess Purl from the sleepy spell?

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It does seem to ring a bell.

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We had to lift the really heavy bell off the ground

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so we could ring it to wake Purl up.

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-Ah!

-Ah!

-Ah!

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Oh, this yarn isn't strong enough to lift the bell.

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Some things are really heavy, but engineers can help figure out the

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strength of ropes and cables needed to lift, move and hold heavy weight.

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-Now it's your turn to try.

-Woohoo!

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Yarn is very strong

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but look what happens when you separate the strands.

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I don't believe it, Bitz.

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It breaks really easily.

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When strands are on their own, they're much weaker.

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But put them together and they're super-strong. It won't break.

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Hoo-yeah! That's great!

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We needed something super-strong to lift the bell.

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It's time for a Bitz Brain Blitz.

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We tried to lift the bell with one piece of yarn,

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but the bell was too heavy and the yarn wasn't strong enough.

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But if we use more lines of yarn to lift the bell,

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then the weight of the bell would be shared between them

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and the yarn won't break!

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If I twist it all together it would make a rope.

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A rope strong enough to lift up the bell.

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-Go, Bevel!

-Ha-ha!

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Pull!

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THEY HEAVE

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Yes.

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BELL CHIMES

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PURL YAWNS

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Oh, my shining sequins!

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We did it!

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Next, we're going to make our own super-strong lifters.

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Look, we've got yarn, some bouncy balls to lift

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and a bucket to carry the load.

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When you've tied one strand of yarn to the bucket handle

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you can see how many balls you can lift in it.

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Whoops!

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One strand can't lift five bouncy balls in the bucket.

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Now we've tied two strands to the bucket.

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Five, six bouncy balls.

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It works!

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The weight of the bouncy balls is spread out between

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two strands of yarn, so they can lift more.

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I wonder what will happen

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if we twist two strands together like a rope?

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Wow, the twisted yarn lifts loads of bouncy balls.

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Let's try some more and a teddy bear too.

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Hoo-yeah, the twisted yarn is super-strong.

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-Looking good.

-It works!

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Go, twisted yarn!

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Have fun testing how much you can lift

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with strands of yarn or cotton at home.

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That's it. Steam Pink Style!

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Keep engineering and inventing away to save the day.

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-BOTH:

-You can do it too!

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Our friends are making their own superstrong lifters, but how many strands of yarn will make the lifters strong enough to carry a full tube of bouncy balls - and a teddy?