Advance Preparation
and Setup

You will have to assemble the oscillator. Drill a hole in one end of the plastic box for the cord. Mount the battery-holder and buzzer on a small piece of wood. Connect the buzzer wires to the battery clip. If the sound is too loud, place tape over the buzzer. You may also want to tape the battery in place to make sure it stays in the battery holder. Cut a slot in the Nerf ball, stuff the circuit inside, and cover the opening with tape.