No mechanical toy is more interesting to make, nor more interesting to watch in operation, than a miniature paper pinwheel. It is a very simple toy to construct, and the material for making one can usually be found at hand, which are two reasons why nearly every boy and girl at one time or another builds one.
Making a Paper Pinwheel shown in the drawing is one of the best whirlers ever devised. A slight forward thrust of the stick handle upon which it is mounted starts it in motion, and when you run with the stick extended in front of you it whirls at a merry speed.
A piece of paper 8 or 10 inches square is needed for the pinwheel. Fold this piece of paper diagonally from comer to comer, both ways. Then open the paper, and with a pair of scissors cut along the diagonal creases, from the corners to within 1/2 inch of the center (Fig. 2).
Next, fold corners A, B, C, and D over to the center, as shown in Fig. 3, run a pin through the corners and through the center of the sheet of paper, drive the point of this pin into the end of the stick handle, and the pinwheel will be completed.