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. The GraviTrax PRO Vertical Expansion Set offers 33 additional elements to reach new heights with your track. The GraviTrax PRO Vertical Expansion Set offers 33 additional elements to reach new heights with your track. Create dynamic marble runs with walls, pillars and balconies that take your tracks to new heights. Whether you create towering three-dimensional structures or suspended tracks, see how high and clever you can build. Combine with the GraviTrax Pro Starter Set and take your track to a new level. 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. Contents: 8x Pillars, 4x Tunnel Pillars, 2x Walls Long, 3x Walls Medium, 16x balconies