Experience the power of gravity! GraviTrax is the all-new STEM track system from Ravensburger! Use your imagination to build superb tracks and set the gravity spheres rolling! This expansion pack includes over 40 components to extend the fun of your GraviTrax with even more tiles and tracks. 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. This set is suitable for 1+ players, ages eight years and up. Includes 16 x large vertical tile, 8 x small vertical tile, 7 x curved base, 1 x 'x' base, 1 x long rail, 2 x medium rail, 3 x short rail and 6 x gravity sphere. Warning! not suitable for children under 36 months due to small balls – choking hazard.