Can't decide which Ninny to get? Get all three! Ninny is an awesome fidget for many reasons but it's the center link that makes it unique and an instant fidget favorite. Unlike any other fidget, Ninny has 8 silicone rings that roll smoothly, providing great fidget feel and fluidity. Use Ninny to help reduce stress, anxiety and symptoms associated with ADD/ADHD, Autism, nail biting, hair twirling, leg bouncing, etc. Go Ninny Go! Ninny comes in three different sizes; regular, mini and jumbo size.