Water Power: Rocket-Propelled Cars, Boats, and More from Thames & Kosmos Harness the power of air and water to make things move! Build water-rocket cars, jet-propelled boats, a water gun, and even a lawn sprinkler. Learn about the laws of physics and their applications in real-world engineering. When you pump air into your rocket, you increase the air pressure inside. Then when you release the clamp, watch out - the air and water mixture inside will shoot out, causing your rocket to zoom off in the opposite direction! Build six different air-and-water powered models Learn about the physics of action-reaction forces, rocket propulsion, nature's rockets, compressed air, and pneumatics Make a big splash into physics with these fun, wet, and wild models Recommended for ages: 8+