Experience the power of gravity! GraviTrax is the all Contruction toy STEM track system from Ravensburger! Use your imagination to build superb tracks and set the gravity spheres rolling! Trigger the Flip! Transport your marble up a level and sending it in the opposite direction! Combine the Flipper with the GraviTrax Starter-Set and trigger incredible track action! How far can you make your marbles go with the Flip? 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-onseach sold separately. This set is suitable for 1+ pl