Have fun with STEM concepts when you choose the Stomp Rocket Ultra, 4 Rockets. This 100-percent kid-powered toy uses play to introduce kids to important concepts such as gravity, trajectory force and the power of air. Users can run, jump and stomp to launch rockets up to 200' in the air. Assembly is fast and simple, and the rockets are foam-tipped for safety. This Stomp Rocket toy is suitable for kids ages 5 years and up.