The ultimate STEM EDUCATIONAL GAME for young engineers and problem solvers! GraviTrax is a building system that combines the principles of physics and engineering with fast-paced action and excitement. With over 200 unique pieces including tracks, switches, and elevators, the possibilities for building and experimenting are endless. Players can design their own gravity-defying marble runs and challenge themselves to create increasingly complex and impressive layouts. Perfect for fostering critical thinking, creativity, and problem-solving skills, the Gravitrax Action Set Skytrax XL is a must-have for any budding engineer or scientist.