https://techcrunch.com/2018/07/06/buckyballs-are-back/

Years ago – six years ago, to be exact – a toy called Buckyballs came under attack by government officials intent on destroying fun. The Consumer Product Safety Commission banned the toys, which we noted were tiny rare earth magnets that were good for play but bad for a snack, because a few overzealous children swallowed one or two and found themselves in gastrointestinal distress.

The lawsuit against ZenMagnets, creators of Buckyballs, began as a “recall prior to record of injury,” something unprecedented in this space. That meant the company had to stop selling its magnets before anyone was actually injured, an odd position for a small company to be in.