A piece of paper 8 or 10 inches square is needed for the pinwheel. Fold this piece of paper diagonally from corner to corner, both ways. Then open the paper, and with a pair of scissors cut along the diagonal creases, from the corners to within ½ 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.
Fig. 2.—Diagram for Paper Pinwheel.
Fig. 3.—How the Paper Pinwheel is Folded.
The Pinion-wheel Windmill in [Fig. 4] may be made of cardboard or tin. A circular piece 10 or 12 inches in diameter is required. After marking out the outer edge with a compass, describe an inner circle about 1 inch inside of it; then draw two lines through the center at right angles to each other, and another pair at an angle of 45 degrees to these. These lines are shown by the heavy radial lines in [Fig. 5]. One-half inch from each of these lines draw a parallel line, as indicated by dotted lines in [Fig. 5]. The next thing to do is to cut out the disk, and cut along the heavy lines just as far as the lines are shown in the diagram ([Fig. 5]), and then to bend up the blades thus separated, to an angle of about 45 degrees, bending on the second set of radial lines (dotted lines in [Fig. 5]).
