Two levels are connected via several entrances and exits and the stone can be used several times during one pass. Rolling balls can either take a seat in the carousel or let it start. Once the carousel is in motion, all parked balls are sent onto the track. How often can the balls drive the carousel in one pass?\nBuild new routes and create crazy trick shots, expand the marble run with new ideas, expansion sets to keep the ball rolling compatible with all GraviTrax & GraviTrax PRO sets & accessories\nExperiment with gravity to power your ball through twists, loops and turns in a race to the finish line great building game for boys & girls\n\n\nThe GraviTrax track system can be extended indefinitely with extra track packs and add-ons each sold separately.\n\nSuitable for ages 8 years and up.\n\nTHIS IS AN ADD ON PACK – A STARTER SET IS REQUIRED TO PLAY\n\n\n**All GraviTrax and GraviTrax Pro products are compatible**