Experience the power of gravity! Gravitrax is the all new stem track system from ravensburger! When fully primed the gravitrax magnetic cannon will give the gravity spheres a major boost in speed. If you have to go slightly uphill the magnetic cannon will help! Use your imagination to build superb tracks and set the gravity spheres rolling! This stem system science, technology, engineering and maths is an ideal one 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! Are the gravity spheres stopping or flying off before reaching the end target? Time for some problem solving. Rebuild and try something different! The gravitrax track system can be extended indefinitely with extra track packs and add on's each sold separately. The gravitrax magnetic cannon set is suitable for 1 or more players who ages 8 years and up and includes 1x magnetic cannon, 3x gravity spheres. Height 4.8 cm width 19 cm length 19 cm