The quality of Ravensburger toys blends with innovation, principles of physics and fun to create a fantastic game. With the Gravitrax Starter Set you can start creating an interactive marble circuit. With the GraviTrax track you can unleash your creativity by building a fantastic world of paths that follow the gg of gravity. Blast the marbles to the finish line, playing with the principles of magnetism, kinetics and gravity. With GraviTrax you can explore gravity and never get bored, because the pieces in gg iuntivi allow you to extend your route to infinity.