Premium Material: The kids stepping stones made of quality pp material, thicker material is more sturdy, flexible and comfortable. Anti slip : There are non slip circles at the bottom of the stepping stones, Let the child have better experience as toddlers sensory toys. Function: Balance Block can exercise children's balance, logical thinking and concentration ability and exploration ability. Unique Design: Stepping stones meet needs of children at different stages of development. Colorful colors can help promote their color cognition ability. Kids can walk, stand, jump or climb stepping stones exercise balance and coordination. Ideal Gift : Crossing river stones are great gift for family and friends. Using as birthday gifts, children's holiday gifts, couldn't be more great, as it helps to spark curiosity, imagination, and creativity in children. Specification: Material:PP Size Chart: Diameter: 20cm/7.87inch Package Includes: 5 Stepping Stones Note: 1. This is not infant toy, please take away from children to avoid eating. 2. Please allow slightly errors 1-2cm differences due to manual measurement.