Experience the diversity! The carousel is very versatile: Two levels are connected via several entrances and exits, and the action stone can be used several times during a round. Rolling balls can either stay in the carousel or set it in motion. When the carousel turns, all parked balls are sent out onto the field. How many times can the balls run in the carousel in one round? This STEM system [Science, Technology, Engineering and Maths] is ideal for teaching children about gravity, magnetism, k