With ruler and triangle draw square 4" sides.

Draw diagonals. Teach meaning of diagonals.

Measure ½" from center on each diagonal.

Cut out square with scissors.

Cut on each diagonal to the ½" mark, as in drawing.

Roll right hand corner over and upward, as in sketch.

Insert a pin through ends of wings and center of square. Materials: Coverpaper and pin.

The windmill is one of the first devices to utilize the wind as a motive power. The earliest attempts were made in the eighth century.