Look at how the windmill is made and why it turns.

Today, my mother and I made a windmill together. I first cut a piece of blue cardboard into squares, then cut it into four pieces obliquely, picked up one corner and stuck it on another corner, and glued the four corners together. Grandpa helped me to insert a bamboo stick, and then positioned the front and rear ends with red wax paper. A beautiful blue windmill was made. I picked it up and ran around. The windmill is spinning very fast, and I am very happy.