The ultimate in Stomp Rocket performance! X-Treme Stomp Rocket is 100% KID powered: Run jump and STOMP to launch these air rockets up to 400 feet in the air - that s longer than a football field including the end zone. These air rocket launchers are the perfect toy to get kids playing outside away from screen time and having fun! Use the adjustable rocket launcher to experiment with trajectory and force. X-Treme rockets make great STEM toys and launch to incredible heights. Includes a Stomp Rocket Launcher and 6 X-treme Stomp Rockets. Refill rockets also available. For kids ages 9 and up.