Also a good point: what purpose they are being sold for. Magnets for crafting purposes are clearly very useful. I've got a drawer full of various sizes of such

Also a good point: what purpose they are being sold for. Magnets for crafting purposes are clearly very useful. I've got a drawer full of various sizes of such magnets myself (because every maker on Thingiverse seems determined to discover a unique new size of tiny magnet). But crafting tools are often dangerous and aren't intended as toys to be left in the open. Crafters with kids are already well aware that leaving crafting supplies near children will always end in disaster.