With it Starter Kit GraviTrax you can enjoy creating a circuit for interactive scales which follows the laws of gravity. This rich starter kit contains more than 125 pieces to create always different paths to roll the marbles to the finish line using the principles of kinetics, gravity and magnetism. Use the Magnetic Cannone to "paint" the marbles and throw them along a path full of thrilling surprises! This game involves the whole family and children from 8 years of age