Features: Function: indoor activities decompression, adsorption, can be used as sticky target ball.It can be self-adhesive on glass, wood and other flat surfaces.The ceiling can be stuck for 3-20 seconds, and plaster wall can be stuck for 5-30 seconds. Thees sticky balls can absorb light and store it, and then these balls will emit a beautiful light in the dark environment. SAFE & REUSABLE : These stress relief sticky balls are made of quality rubber materials, which is absolutely safe for human healthy. It is lightweight, durable, waterproof and reusable. When the stickiness insufficient, it can be restored as new by washing with water. TEARING RESISTANCE:The luminescent stress relief ball has super resistance to tearing resistance, no matter how pinch it or throw it on the ceiling, wall or floor. Whether squeezing, stretching, pulling, tossing, etc, the sticky ball will immediately return to their original shape. Suitable for all children and adults, and can also exercise the baby's grasping ability. The sticky ball can help promote a sense of calm, reduce stress and anxiety, and can increase for focus. Specifications: Material: TPR Color:White/Orange/Blue/Green Size:Approx. 1.8x1.8in/4.57x4.57cm Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Sticky Balls Glow