Mozi spins continuously and effortlessly as it moves up and down - from one arm to another, or as you pass it to a friend. Watching it glide is just as mesmerizing and addicting as it is to use. Get your groove on and feel the movement! Geometric sensory spring toy. Great fidget toy for school / office use. Recommended for ages 6+. 5" in diameter (when flattened as a ring)