wind mill.

Pinwheel.

Today me and my class made wind mills out of paper.
We found out if you do it upside down it was the same.

If you get a smaller pinwheel it will go faster.

If you have a big one it will get stuck

on the stick but if you get a bead the big pinwheel won't get
stuck on the stick.

We are learning about rotatianal symmetry.