Experience the power of gravity! GraviTrax is the all new marble run track system from Ravensburger! Use your imagination to build superb tracks and set the gravity spheres rolling! With the GraviTrax Catapult you can overcome some serious obstacles. Briefly overcome gravity as the gravity sphere flies through the air but you will need to make sure the sphere has a place to land and finish the track! Contents: 1x Set of Instructions, 1x Catapult Base, 4x Gravity Spheres 2x Spare Rubber Bands Suitable for ages 8+