Our Say: Electric Cannon Explore the world of basic electrics through this exciting electric cannon! See how energy transfer works as you fire ping pong balls from the spinning wheels. What is kinetic energy? What is potential energy? Young scientists can explore the world of basic electrics through this exciting electric cannon science kit. You can build the cannon from the materials provided and let those ping pong balls fly! Contents: - Battery box. - Base plate. - Motor. - Wheels with pulley...
