In the 80's I invented and patented several toys that used magnetism to produce magical effects. Two of them were recognized by Games Magazine as the Top 100 games, two years in row. The "Ibex" received a patent which was shared by "Eternal Suspension."  Both were sold in toy stores and through mail order ads in several magazines. There was also, "Suspension of Disbelief" that used magnets and the patented "Sedimental" (which used sand and a gravity-defying chrome ball).