If your gravity spheres are decelerating, this hammer will launch the spheres through your track with some much-needed velocity. The GraviTrax Hammer will add some much-needed velocity to your track system. If the gravity spheres have slowed to a crawl this Hammer will smack the sphere giving it some much needed momentum to complete the circuit! Use your imagination to build superb tracks and set the gravity spheres rolling! This STEM system (Science, Technology, Engineering and Maths) is an ideal solution to teach kids about gravity, magnetism, kinetic energy and fun. Hit a snag? Freestyle with your own track design or use the tasks and blueprints included to help you to get started in the world of GraviTrax! Do gravity spheres stop or fly off before reaching the final target? Time to solve some problems. Rebuild and try something different! The GraviTrax track system can be extended infinitely with extra track packs and add-on’s – each sold separately. This set is suitable for 1+ players, for 8+ years old kids. Features: 1x Set of Instructions, 1x Hammer Tile, 1x Long Track, 2x Medium Tracks, 3x Short Tracks Total Pieces: 7