Ravensburger GraviTrax Action Pack Catapult Interactive Track System is the all Construction toy stem track system from ravensburger. Use your imagination to build superb tracks and set the gravity spheres rolling. With the gravitrax catapult you can overcome some serious obstacles. Briefly overcome gravity as the gravity sphere flies through the air. You will need to make sure the sphere has a place to land and finish the track. 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. As seen on tv gravitrax is an innovative marble run and construction toy for boys and for girls ages 8 years and up. It is an ideal christmas gift or birthday gift for smart, curious kids. With the gravitrax catapult you can overcome some serious obstacles. Innovative the gravitrax interactive track system allows you to design and build your own race tracks and experiment with engineering, gravity, magnetism, and kinetics to propel your ball to the finish. Infinitely. Expandable gravitrax in fully expandable with a large range of expansion pack and accessories an amazing building toy. Develops critical skills by playing and building with gravitrax builds spatial reasoning and planning skills, and provides a great stealth learning experience.