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This is an AC electric generator which lights up a tiny incandescent light bulb. The generator is made from a plastic boel with a nail through the center. The box has many turns of varnished thin copper wire wound around, with large magnets clamped around the nail. When the nail and magnets are spun fast by hand, the little light bulb lights up dimly. AGE GROUP 10 TO 15 YEARS. SIZE APPROX: L: 6" - W: 6" - H: 6".