Package Quantity: you will get 8 fluorescent sticky balls<br> Product Features: when the decompression balls are received, because the packaged products have not been exposed to light during long term transportation, first of all, the sticky balls need to be exposed to sunlight and purple light for a period of time When the decompression balls absorb some light, they will glow in the dark, bring you a lot of fun<br> Product Size: each ball is the same size, about 1.8 inches/ 4.5 cm, suitable for grip and help relieve pressure;To prevent accidents such as swallowing, children should use it under adult supervision; Parents and children play together andenjoy happy parent child time<br> Soft Material: quality thermoplastic rubber, soft and safe, not easy to break, easy to clean the surface, the surface may absorb some dust, and the viscosity will decrease;If you find that the sticky ball is dirty, or the surface viscosity drops,you can wash the ball surface with clean water, and the viscosity will recover<br> How to Play: you can throw these sticky balls on a clean and flat surface, such as walls, ceilings, desktops, tiles, etc., wait for the balls to fall slowly, and then catch them, which can help you relax; Note: the balls must be clean, so as not to stain the wall, because the wall is different, do not throw it on the wall if you are afraid of soiling the wal