Develop strength and balance with this set of Gonge Bouncing River Stones Set. The Gonge Bouncing River Stone Set adds an increased challenge as children hop from one stone to the other. The purpose is to jump from stone to stone without touching the floor. You can vary the position of the stones to create more challenging paths for children. Each stone has rubber studs on the base which prevent them from slipping, and also protect indoor floor areas. The Gonge Bouncing River Stones Set builds children's confidence when jumping, judging distances, coordinating and balancing. Includes 4 river stones and 1 bouncing river stone.