Pinwheel windmill that lifts

How to make it

1. 

   1

   Make the pinwheel

   Cut from each corner of the square toward the middle, stopping 1 in from the center. Fold every other point into the center and tape.

2. 

   2

   Make the tower

   Grown-up step: poke a hole straight through both sides of the cup near the bottom. Turn the cup upside down.

3. 

   3

   Add the shaft

   Push the wide straw through both holes. Slide the skewer through the straw so it spins freely.

4. 

   4

   Mount the blades

   Push one end of the skewer through the pinwheel center. Hold it in place with a bead of clay on each side.

5. 

   5

   Tie on the load

   Tape the thread to the other end of the skewer. Tie a paper clip to the bottom of the thread.

6. 

   6

   Blow and lift

   Blow on the pinwheel or set it in front of a fan. Watch the thread wind up and lift the clip.

7. 

   7

   Talk about why

   Wind pushes the angled blades and makes them turn. The spinning winds the thread like a fishing reel. Real windmills use that spin to pump water or make electricity.