Astro Jumpball 1.The external design of the bounce ball with small holes, highly elastic PU material, with deformation resistance, quality materials, very durable. 2.The shape of the moon ball gives it plenty of room to rotate and burst when it hits the ground, and light moon foam is the most elastic material on earth! 3. The moon ball is not only fun, but also improves hand-eye coordination and is used as a training ball by professional athletes. 4. Bouncing ball suitable for children and adults as birthday gifts, Christmas gifts and a good choice interactive toy for beach, outdoor activity, water game too. Specifications: Material: high density PU material Color: Red, Yellow, Blue Size: diameter 66mm The product contains: 4 x jump balls Note: 1. Manual measurement, the size has a slight error of 2-3cm. 2. Color differences may occur due to different displays. 3.Safety Warning: Not suitable for children under 3 years old. Use under adult supervision.