Material: Stress relief ball is made of high-quality thermoplastic rubber material, which is safe, non-toxic, durable, elastic, high tear resistance, not easy to damage, can be reused, and children can play freely.Relief: Ceiling sticky balls decompress stress relief ball, holds the pressure release ball comfortably, can squeeze, stretch, pull, throw and bounce, and will immediately return to the original state, the perfect choice to relieve stress.Interesting: Fun wall sticky ball pressure venting balls, throw these sticky balls toward the wall or ceiling, they will slowly fall, and multiple sticky balls will be continuously thrown onto the roof to help you release the greatest pressure.Features: Luminous decompression ball toys for children and adults, can relieve stress, release anxiety, the best gift for people suffering from ADHD, obsessive-compulsive disorder, autism, anxiety, etc.Use: 2 sizes: 1.77inches, 2.56inches. Suitable for classrooms, offices, indoors, game theme parties, graduation parties, Christmas parties, Halloween, carnival parties, garden parties, etc. It can be washed with water, and the viscosity will recover after drying.