Material: Our stacking ring toy made of high-quality material is soft and non-toxic. They have a good soft and chewableno and edge. You don't have to worry when your children play with it and bite it, perfect to use as a teething toy. Puzzle building blocks toy: this stacking tower for stacking game to satisfy the curiosity and tactile experience of the baby, help your baby learn. Mosaic design with concave-convex shape, can train baby's hand coordination and fine hand movements and strengthen the shape recognition of the baby, six different sizes promote the baby's ability to distinguish the size of objects. Small surprise: one set has 1 x koala + 6 x layers of soft rubber ring, satisfy the baby's daily play, squeeze teething baby toy. At the bottom of each soft circle there is a small hole, a squeaky sound sounds when children press the soft stacking rings. and improve baby's sensitivity. Teething rings: stacking toy with rings. It can be used to heal the baby's oral pleasure period. It is full of elasticity and does not harm the mouth and teeth. It can relieve the baby's discomfort when teething.