Here on Hackaday, [Caleb] built a Portal gun which levitated a Companion Cube. Rather than go the magnetic route, [Jacob] levitated a ping-pong ball on a cushion of air. Now, it would be ...

Oregon State University scientists have developed a highly efficient, uniquely shaped magnetic nanoparticle that could enable ...

There is a cube-shaped version as well, called magnetic cubes. The agency and the pediatric society have received 10 reports of children accidentally swallowing magnetic balls and suffering ...