The National Geographic Light-Up Air Rocket Refill pack has 5 replacement rockets compatible with all National Geographic light-up air rocket launcher sets! Each rocket has a switchable LED light inside, allowing you and your kids to launch rockets day or night! When the lights are switched on, send your glowing rockets into the night sky and enjoy the incredible light show! Even if you still have all your original rockets, a refill pack is nice to have just in case a rocket is lost or damaged. These rockets are designed for exclusive use with National Geographic air-powered rocket launcher sets and may not be compatible with other launchers. National Geographic Toys makes the highest quality hands-on science toys, and all products are backed by exceptional service. About the National Geographic Society: With a mission to inspire people to care about the planet, the National Geographic Society is one of the world's largest nonprofit scientific and educational organizations.