Ravensburger GraviTrax Starter Set Speed - Marble Run, STEM and Construction Toy Toy Kids Age 8 and Up - Indoor Activities for Boys, Girls and Families

The GraviTrax interactive marble run system has been developed to plan, build and optimise exciting marble runs. It needs to be experimented with gravity, magnetism and kinetics to move the ball from start to the target. The open concept allows almost infinite possibilities to design a different track every time. The GraviTrax Speed Starter Set is specially designed for the game at speed. It in...