Take a piece of square paper, fold it in half and open it again. Take the scissors, cut half along the fold line, bend back to the middle, and fix with solid glue. Take a smaller square and cut a small round paper. The round paper is pasted at the center of the bending of the large square with solid glue. Take a straw, fix it on the center of the big square with a pin, and a windmill is formed.<br>
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