These bouncing balls are made of material and are safe for kids to play with. The patterns are innovative, brightly colored, fun and special. Toy bouncing balls are good for promoting color understanding and early education and enriching children's playtime. Suitable for children to activities, etc. Features -Color:Assorted Color -Material:Rubber -Size:3.20X3.20X3.20cm/1.26X1.26X1.26in -Note: Style -Our fun bouncing balls are made of selected rubber material for excellent performance and durability. -These kids rubber ball game toys are designed to be lightweight and portable can take them with you. -Wide range of applications for these stress relieving bouncing balls. Suitable for children's parties, birthday gifts, teaching rewards, etc. -These Anti-stress Rubber Balls are a good gift choice. It is the best children, especially for birthdays, children's day, etc. -These game bouncing balls can help your kids improve their cognitive skills while playing with the ball. Educational use. Package list: 20 x Bouncy Balls