Packing quantity: you will get 10 fluorescent sticky balls (random colors). Different colors light up the night and are ideal for group play with friends and family. Product size: each ball measures approximately 2 inches (4.8 cm) in diameter, making it easy to grip. For safety, adult supervision is recommended to prevent accidental swallowing. Soft material: made from quality thermoplastic rubber, the balls are soft, safe, and durable. The surface is easy to clean. After use, the surface may collect dust, which can reduce stickiness; rinsing with water restores the original stickiness. How to play: throw the sticky balls at a wall and wait for them to slowly slide down, then catch them. This activity can help promote relaxation. Note: the balls can adhere to the ceiling for 320 seconds and to a standard white plaster wall for 530 seconds. Product features: the stress relief balls absorb light and glow in the dark, providing engaging entertainment. They are designed to support relaxation and enhance interaction among family and friends. Suitable as a gift for birthdays or holidays.