Mandalay, do kids in Haiti believe in the tooth fairy? How do you say tooth fairy in Creole? Thanks!

Well, the Haitian tooth fairy is actually a rat.
In Haiti, when children lose a tooth, they throw the tooth on the roof of their house and say, 'Rat, rat, rat! I am throwing you a beautiful tooth, send me a bad tooth'. Rat, rat, rat! Men yon bèl dan m voye pou ou, voye yon move dan pou mwen.

The belief is if to trick the tooth-hungry rat into accepting the bad tooth so that the child may grow the tooth back.  If the child doesn't grow a tooth, then the rat didn't buy into the lie :)
Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words