Tools: colored paper; Wooden stick; Scissors; Nails. The detailed steps of the windmill are shown in the following figure: prepare a square piece of colored paper, a nail, a wooden stick and a pair of scissors. The color of the scissors is your favorite color.

First, fold it twice along the diagonal of the square colored paper, as shown in the figure below. Then expand. Next, use scissors to cut the four sides along the crease of the square colored paper, but don't cut it. Next, use scissors to cut the four sides along the crease of the square colored paper, but don't cut it.

Next, use scissors to cut the four sides along the crease of the square colored paper, but don't cut it. Finally, the fixed colored paper and the stick can be fixed together, and a small hand-made windmill is completed.

1. Preparation materials: short flat wooden sticks, long flat wooden sticks, long flat wooden sticks with holes, square wooden strips, double-sided adhesive tapes, tie tapes, round wooden blocks, small motors, screws, battery boxes, colored paper and wires.

Screw the log piece and the square log together, and stick two pieces of double-sided tape at the bottom of the log piece for later use. Then stick two flat wooden sticks under the log, pay attention to the position and orientation of the small holes and square wooden strips on the flat wooden sticks, and then fix the battery box on the other side of the flat wooden sticks with double-sided adhesive tape.

Pass the plastic cable tie through the small hole at the upper end of the square bar, tighten and fix the small motor, and cut off the redundant part. Put two flat wooden sticks with holes in the middle into the motor shaft. Glue can be added to the joint of the flat wooden stick to fix it.

Take two long flat wooden sticks and stick them on both sides of the motor and log with adhesive tape to strengthen the windmill skeleton. Cut each piece of colored paper into four pieces on average, and then stick the cut pieces of paper on the long flat stick in turn to make the blades of the windmill. Connect the wires of the battery box to the two poles of the small motor respectively.

Finally, install the battery and turn on the switch of the battery box. After electrifying, the windmill blades will rotate rapidly under the electric drive, and the windmill will be completed.