Constructed from a single strand of thin, flexible metal, the Flow Ring is both a kinetic sculpture and a mesmerizing flow toy. With one look, you'll see why it has been called a "4th dimensional Slinky." Folds flat and pops open into a beautiful 3D geometrical shape. Slip it on your arm or a rope and watch its translational energy change to rotational energy! Centripetal forces cause the ring to expand as it spins faster. The result is remarkable: the Flow Ring begins spinning while simultaneously falling, creating the illusion of a silver bubble. The secret is in how the metal is wrapped--the ribbon coils through itself, forming a torus knot. Get ready to be astonished as you watch this spherical toroid ring roll, bend, and flow. Comes with storage pouch.