1
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As you know, all machines need energy to work.

2
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Our machines use energy from people to move the wind blades.

3
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There are two types of machines.

4
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A simple machine that has one or two parts,

5
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and a complex machine that has more than two parts.

6
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Our machine is a simple machine.

7
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Now, we will explain different parts of how it works.

8
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First, we will build the tower of all cardboard and paper.

9
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Second, we will build the windows of all paper and steel.

10
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Then, we will make the collision with the last pieces.

11
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Finally, I use my hands to move the blade.

12
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Thanks for listening. Bye-bye.