children's toys stepping stone sensory training equipment early childhood education balance training epp stepping stone over bridge stone 儿童玩具过河石感统训练器材幼儿园早教平衡训练epp踩踏石过桥石

single red single orange single yellow single green single blue single purple single pink milky white single dark blue empty color box in groups of 3 empty color box in a group of 6

diameter 27.5cm