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 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-ons each sold separately. This set is suitable for 1+ players, ages eight years and up. The starter set comes with over 100 components and offers everything you need to get started right away – a pack full of endless possibilities and creativity. It includes 1 x set of instructions, 1 x set of blueprint, 1 x exercise booklet, 4 x card bases, 2 x transparent levels, 6 x gravity sphere, 3 x long rail, 6 x medium rail, 9 x short rail, 1 x magnetic cannon, 21 x curved base, 3 x ’’ intersection base, 1 x vortex base, 2 x y points base, 1 x end target, 1 x three-in-one base, 4 x base for insert, 1 x three-way starter base insert, 2 x catcher base insert, 2 x switch, 1 x base insert, 1 x free fall base insert, 1 x target base insert, 40 x large vertical tile and 12 x small vertical tile. Warning! not suitable for children under 36 months due to small balls – choking hazard.