Stepping stones for better coordination, balance and fun. Jump from stone to stone without touching the floor. You can vary the position of the stones to create challenging paths. Each stone has rubber studs on the base which prevent them from slipping. Each set includes 6 stones in 6 colors: three measuring 38cm Diam. x 9cm H (15" Diam. x 3-1/4" H) and three measuring 26cm Diam. x 5cm H (10-1/4" Diam. x 1.77" H).