4 ms·

"Unusually strong neodymium magnets" were a popular young-adult toy in the late 2000s to early 2010s. I had them both in flat discs and little balls. Now that

• kqr 5y ago
  They were also a part of rotating rust drives, which made it very fun to find old ones and pick them apart.
• marton78 5y ago
  Wait. What will they do to babies?!
  • caf 5y ago
    If someone swallows more than one, they can pinch together different parts of the intestine or bowl and cause a perforation, which is a serious medical emergency that if untreated will lead to death. It's dangerous for anyone, but babies and toddlers are most likely to actually swallow them.
    • mcv 5y ago
      It's the only example I know of where swallowing one thing is totally harmless, but swallowing a second one is really seriously dangerous.