Discovery Toys HYDRO LAUNCH Water Rocket Amazing Hovering Water Splasher! Control water pressure to raise and balance the rocket on a stream of water. Simply attach the easy-to-use thrust controller to a garden hose. Fosters experimentation and trial & error as you vary the speed and height of the rocket. Keeps kids engaged and playing outside. Strengthens fine and gross motor skills. Learn about center of gravity and balance. Stay cool on a hot day. From 6 years & Up.