It spins continuously and effortlessly as it moves up and down – from one arm to another, or as you pass it to a friend. Mesmerizing and addicting to use Get your groove on and feel the movement! Spins continuously and effortlessly as it moves up and down - from one arm to another, or as you pass it to a friend. Geometric sensory spring toy Great fidget toy for school / office use Recommended for ages 6+ Best used on bare skin 5" in diameter (when flattened as a ring)