The parts of the gun are attached to a thin piece of wood 1 in. wide and 5 in. long. It is best to use a piece of wood cut from the side or cover of a cigar box. A rectangular hole 3/16 in. wide and 1 in. long is cut in the wood longitudinally along its axis and 1-3/8 in. from one end, as shown at A, Fig. 1. A small notch is made with the point of a knife blade at B and notches are cut in the end of the wood as shown at C. Rubber bands are fastened in these notches as shown in Fig. 2. The trigger, whose dimensions are given in Fig. 3, is fastened in the hole A, Fig. 1, by driving a pin through the wood. The assembled parts are shown in Fig. 4.
Place the cardboard square in the nick B, attach the rubber bands and pull the trigger. The top rubber band will fly off and drive the cardboard square 75 ft. or more. The cardboard should be about 1/2 in. square. These can be cut from any old pasteboard box. --Contributed by Elmer A. Vanderslice, Phoenixville, Pa.
Illustration: Details of Toy Gun