Ferromagnetic Silicone Putty
This silicone bouncing putty responds to the presence of a magnetic field. Place a blob near or between two strong magnets and watch what happens. Especially good attraction with our neodymium magnets. 1/5 lb (91 g). Comes with a magnet (style may vary).
Note: Videos show putty with our much larger M-195 Neodymium Magnet.