Unlock the infinite possibilities of the GraviTrax Universe with the Ravensburger GraviTrax Starter-Set Bounce. With this unique and interactive track-building system, create and experience marble run action like never before. The GraviTrax starter-set bounce includes 101 pieces and features two action Elements to add wow-factor to your tracks.Send your marble round and round the bend with the spiral element and bounce your way to the finish with 2-part trampoline element. Take inspiration from the included track layout plans or simply let your imagination go wild. Add in twists, turns and trick shots to send your marble racing around your tracks.Build beyond the usual with GraviTrax as you challenge yourself, experiment and take the action further than ever. This set is compatible with all other GraviTrax sets and accessories, so you can grow and expand your GraviTrax world however you choose.