This makes me think of Terry Pratchett's Hogfather
Uffe Heide-Jørgensen
Can’t wait for somebody to work out the implications of this idea in a 5,000 word post on toothfairyeconomics in the appropriate subreddit.
Julia M. Rohrer
11yo: “You know how the tooth fairy takes teeth and leaves money? I think that’s because in their world they use teeth as their money.”