512 Mashable, Smashable, Rollable, Buildable, Puzzling, World-famous, Fun for adults, All-you-can-build with, Rare Earth, neodymium magnetic balls.
Warning use at your own discretion.
Do not put near or in nose or mouth. Swallowed magnets can pinch and stick together across intestines causing serious injury or death. Seek immediate medical attention if magnets are swallowed or ingested.