Materials Required:—

A piece of soft wood three-quarters of an inch thick and about six or seven inches long, a gimlet, a soft wood skewer, penknife, sandpaper.

This is a little air propeller which is rapidly whirled between both hands and released: if properly done it should return to the hands. The propeller is cut out of wood on the same principle as in Figure 52, but it may be of thicker wood with a greater amount of angle to the blades. The stick must be carefully fitted to the hole in the blades and must be thicker at the other end. Both blades and stick should be well smoothed with sandpaper.