Stepping Stones Set of 9, Stackable Non-Slip for Indoor and Outdoor, Assorted ColorsSafe and Secure Design Each river stone features non slip strips and a textured surface for enhanced safety. With a maximum weight capacity of 80 kg, they offer peace of mind for parents and allow children to play freely. Balance and Fun This set of nine stacking stones for toddlers promotes balance, improves coordination and body control, and fosters creativity and problem solving skills during play. They are ideal for use both indoors and outdoors,