Master Toys brings you the Playmaker Super Duper Squish Ball to relieve you of all your stresses. This thermoplastic stress ball toy is made of durable resin material. This anti-stress toy consists of a gelatinous liquid core within a sturdy but flexible outer shell that gives you satisfaction with every squish. This hand exercise ball is a malleable toy, and the squishy stress ball bounces right back to its original shape, ready for the next squish. Squeezed by the hand and manipulated by the fingers, this plastic ball relieves stress and muscle tension and exercises the muscles of the hand. So, get ready for hours of squishing with this squish anti-stress ball.