How to Make a Ping Pong Ball Launcher
To make a ping pong ball launcher you will need 2 paper clips, 2 rubber bands, 2 half-round styrofoam shapes, a styrofoam cup, wood dowels, cardboard, craft glue, scissors and ping pong balls. You can find more information here: http://www.ehow.com/how_4866261_build-ping-pong-ball-launcher.html
Take three pieces of wood. A sturdy rectangular base, a square block placed at the end of the sturdy block. The third piece should be equal length to the first block and nail them.