GraviTrax Junior is an interactive marble track system with GraviTrax, children build their own tracks and create themed worlds through creative decorating in a playful way. The GraviTrax Junior Starter Set L Jungle includes everything you need to start building right away and immerse yourself in the jungle world, thanks to the wide range of jungle elements and animal figures included in the set, children from the age of 3 can experience the world of the jungle up close and personal when decorating and playing. Ages 3 to 7 years .