I think this is worth worrying about, especially with knockoff magnatiles. The magnets are small enough to swallow. If a child swallows two they could die, for the same reason that "buckyball" magnet toys were banned: the magnets can snap together with intestinal tissue in between and perforate the intestinal wall.

The brand-name ones are surprisingly durable. Can’t speak to the cheaper knockoffs.

The EU's safety rules for children's toys are impressive -- I read them out of curiosity when I was 3D printing a toy.

e.g. dropping a 1kg steel block onto the toy, and checking it doesn't break in an unsafe way (section 8.7 in the link).

https://law.resource.org/pub/eu/toys/en.71.1.2014.html#s8.7

Section A.51 is about magnetic construction toys.

Had to look up the rules on bows and arrows in the European Union when I got to [4.17.4] Bows and arrows. "bows offered for sale with arrows are to be considered as toys" Wait. What? Like, all bows and arrows?

[4.17.4] https://law.resource.org/pub/eu/toys/en.71.1.2014.html#s4.17...

Took a bit to find, yet eventually [Directive 2009/48/EC, Annex 1] "List of products that, in particular, are not considered as toys"

9. "bows for archery over 120 cm long"

[Directive 2009/48/EC, Annex 1] https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32...

Pfew. Not, quite that crazy.