The Making and Fixing of Wheels. If it is desired to attach movable wheels to any of the toys described in the following chapters (in the early chapters for greater simplicity the wheels are gummed to sides of carts, or to matches, etc.), the following methods are suggested.
(1) The wheels can be rigidly fixed to the axle—that is, a match end is pushed tight into the cardboard wheel and the axle is free to turn in loose bearings, as in Fig. 4, fixed under the cart or other vehicle or to the sides. These bearings can be cut from cardboard or cartridge paper.
In Fig. 4 the paper is bent at a right angle along the dotted line, and the rectangular portion is gummed under the cart. If the rectangular portion is gummed to the side of the cart no bend is needed. The parts of the match sticks that pass through the holes must be rounded with sand-paper so that they will turn easily in the holes.
Fig. 4
(2) The axle can be glued to the bottom of the cart and the wheels left free to revolve. The wheels are kept in their places by the following plan. Cut some small cardboard washers, seccotine one near each end of the axle as in Fig. 5a, taking care that they do not come under the cart. Slip on the wheels, taking care that the centre hole is punched large enough to allow the wheel to revolve freely. This will be the case if a steel meat skewer (size about 7 inches long) has been used to make the holes. Fix washers outside the wheels to keep them on, as in Fig. 5b. These washers keep the wheels from sagging.
These wheels will revolve if the match stick has been rounded with sand-paper.
Fig. 5a