My child lost their first tooth today.
I (being clever) got them to put it in an envelope under their pillow ready for the tooth fairy.
The tooth fairy tells me the envelope was empty but they left £2 anyway. Hopefully this is standard procedure. XD
If they are living on their own, mail each of them their teeth in an unmarked envelope/package. The next time you see them ask about their teeth.
Mix it up. Mail them each others teeth…