The silicone surface is easy to clean. After use, the surface will absorb some dust, the viscosity will decrease, and the viscosity will recover after washing with water. The pressure release ball is soft and will not harm the child.Tpr wrapped in silicone material, soft and elastic material can protect the babys fragile gums,environmentally friendly raw materials, non-toxic and harmless. Feel free to pinch, if the sticky wall balls decompression toys are dirty, just use clean water to clear it.Made of environmentally friendly tpr material, these sticky wall balls boys as soft as qq candy, environmentally friendly and harmless. Can play at ease.The size is appropriate, the sticky ball can exercise the kids finger grasping ability, will not let the baby to swallow by mistake; there are four colors of transparent, green, blue, and orange to cultivate the kids perception of color.Our sticky wall ball is a great decompression toy. Whether it is rocking, squeezing, pulling or bouncing, it will instantly go back to their original shape. It can also emit light. Allows your playing at night is more cool.You can throw these balls on the wall or ceiling and stick for 3-10 seconds. It adopts one-piece molding without rivets, smooth and cornerless design, it will not hurt if you grab it at will no parts fall off, preventing babies from swallowing by mistake.Our balls contain a small amount of filler so that they will not stick for so long. By this way, you can exercise your response capability and even abdominal muscles.Helps the blood circulation in the hands. Ideal for stress and anxiety relief, enhanced blood circulation, special needs, perfect gift for your friends or yourself to relax.