Extend your GraviTrax starter set with this excellent building pack with over 25 components.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 25 components to extend the fun of your GraviTrax with even bases and levels to experiment with. 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.Content:2 Base Plates1 Transparent Level8 Large Height Tiles4 Small Height Tiles2 Switches1 3-in-1 tile1 Vortex1 Finish Line4 Basic Tilesinserts for basic tiles: 2 Catchers, 1 Freefall, 1 Splash, 1 Landing