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! Cause an Explosion! The Volcano unleashes new energy into your track system! Combine the Volcano with the GraviTrax Starter-Set for even more action in your track design. How far and how high will your marbles fly after a volcanic eruption?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 8 years and up.Contents1x Volcano Base, 1x Long Rail, 2x Medium Rails, 3x Short rails