Kids will learn all about trajectories, angles, force and momentum as they set up, test and adjust ball launchers and targets into an exciting chain-reaction obstacle course. The ultimate challenge: make all four cannons fire in a sequence that lands the last ball into the skee-blast target! Score the most points by using logic, luck and tinkering skills. Or try to sink the final ball into the red Victory Cup, triggering a finale of flashing lights and sounds. It's a real blast! Includes 23 pieces in all. Uses three AAA batteries (sold separately).