Made with micron-sized iron-based particles distributed throughout, this astonishing, moldable, magnetic putty takes on the properties of a magnet itself when placed in close contact with the included magnet. Within 3 to 5 minutes of being placed near the magnet, the putty will stretch itself out to reach the magnet, almost as if it were alive. Press the magnet into it and the whole piece of putty becomes magnetic, able to lift tacks and paperclips on its own after charging in a magnetic field. Includes teacher’s guide. WARNING: Choking Hazard. Small Parts. Not for children under 3 yrs.