GraviTrax goes vertical with the GraviTrax PRO Starter Set. With 149 elements that include unique components, this set offers everything you need to begin building your own vertical action-packed track systems. Build with walls, pillars and balconies that can be attached together to form three-dimensional structures. The elements can be integrated seamlessly with existing GraviTrax sets, allowing you to create more dynamic marble runs. The pillars have special notches to connect them with the transparent walls and create more intricate paths for the marbles. Suspend your tracks in air with the balconies. 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. Suitable for ages 8 years and up.