Simple, safe, and superb rocket science! This inexpensive air rocket sets up in less than five minutes, and blasts off rockets to incredible altitudes of 200 feet. Perfect for a beginner or an experienced rocket enthusiast. Excellent for experimenting with Newton's laws of motion, rocket propulsion, air pressure, trajectories, and the conservation of energy. Each rocket has a foam-padded tip for safety. Launch bladder is composed of high-strength plastic to withstand student abuse and provide successful rocket launches for years. Complete with launch pad and stand, launch bladder, and four safety-tipped rockets.