Kinetic Spring Flow Rings
Flow rings are a single long band of flat metal wound into a set of overlapping rings. Lay them flat and you can endlessly roll the rings over each other.
Pop the spring open to its 3D state and you have a bouncy sphere that can be manipulated, shaped and rolled.
Color note: Available in green, purple, or silver metal finish. If you have a color preference, please mention it in the comments section at checkout.