This is a very fun stress toy that is not only calming, but it also helps build hand and finger muscles and bilateral coordination. The ball is 3″ and can be stretched out! The ball has a unique soft foam fiber filling that feels like soft putty. It has a super-soft colorful skin. Fidgets are a self-regulation tool used with children who have a difficult time sitting still or focusing. Fidgets help promote focus and concentration and keep the body (fingers) busy so they can still sit and focus! Fidget toys are also great for strengthening hand muscles and building fine motor and finger dexterity.