GRAVITRAX JUNIOR MY PLANET STARTER SET XXLGraviTrax Junior is an interactive marble track system for boys and girls from 3 to 7 years; with GraviTrax Junior, children build their own tracks and create themed worlds through creative decorating in a playful way The GraviTrax Junior Starter Set XXL includes everything you need to start building right away and enter the world of the jungle, the ice, the desert and the ocean GraviTrax Junior is a sustainable marble run system; the 200 components