1. Prepare the following materials: scissors, tacks, glue sticks, bamboo sticks, ruler, and colored paper.

2. First, divide the square colored paper into four equal parts along the diagonal. Draw the lines with a pen and then cut them, stopping near the center.

3. Then paste the four corners in the center and fix them.

4. Then take out the pin and insert the bamboo stick into the small square to fix it.

5. Pass the pin through the center of the colored paper, stick the back to the bamboo stick, and the windmill is completed.