Packing quantity: you will get 10 fluorescent sticky balls ; and it is also very convenient for friends and family to play together Product size: the size of each ball is the same, approx. 1.7 inches/ 4.5 cm, which is very suitable for gripping; For safety reasons, in order to prevent accidents such as accidental swallowing, please use under adult supervision Soft material: adopting quality thermoplastic rubber, soft and safe, and will not break, the surface is easy to clean, the surface will absorb some dust after use, the viscosity will decrease, and the viscosity will recover after washing with water How to play: you can throw these sticky balls on the wall, wait for the balls to fall slowly, and then catch them, which will help you relax; Note: the ceiling can be pasted for 3 - 20 seconds, and the ordinary white plaster wall can be pasted for 5 - 30 seconds Product features: when stress relief balls absorb some light, they will glow in the dark, bringing you a lot of fun, it is very suitable for alleviating physical and emotional stress, and to strengthen the emotional communication between family or friends, ideal birthday gift and holiday gift