Kids can launch this rocket that is powered by just water, but shoots up impressively high, reaching 30 meters, or 9 stories! The set contains everything you need to make take-off a success, including fins, 2 valves, 27cm rocket bottle, hose, and pump. Experiment in your water to air rations to see how high you can engineer your rocket to go! Get kids outside and learning the fundamentals of STEM concepts with science and physics.