The Sensory Genius collection allows busy hands to be productively active so the mind can focus. Master tricks and a calmer state of mind with this one-handed fidget toy. You'll also increase dexterity as you twirl, spin and weave the string around your fingers. The lightweight metal disks provide balanced performance while the iridescent finish mesmerizes your mind. Pop it in your pocket for fun stress-relief that is always at your fingertips!