DescriptionMade of premium rubber material, the bounce balls are safe and for children to play. It can help stimulate your baby visual sense, encourage baby to touch and explore, help them easily distinguish patterns and colors. Besides, it can help develop baby's hand-eye coordination. Bright color can be attractive to baby and greatly arouse their interest to play. Wonderful gift for children on birthday party.Feature- Color: As shown. - Material: Rubber. - Diameter: About 3cm/1.2inch. - Made of premium rubber material, the bounce balls are safe and for children to play. - It can help stimulate your baby visual sense, encourage baby to touch and explore, help them easily distinguish patterns and colors. Besides,it can help develop baby's hand-eye coordination. - Bright color can be attractive to baby and greatly arouse their interest to play. - Wonderful gift for children on birthday party. - This is a set of 50 transparent balls and 50 colorful balls.