How do you get the fairy apear in the fairy fauntain by zora's domain?

Since most fairy tales (european at least) are many centuries old, they are indeed in the public domain

That's the wonderful thing about make believe land. You get to decide. However, by tradition, there is one tooth fairy (who, magically, is able to get to all children whose teeth are placed under...

Well a fairy wand is just realy girly and little children beleive in fairys and think there pretty and a fairy haven is there little groto well sometimes chilfren

Aha, no, the tooth fairy is as real as Santa; only lives in the hearts of young children.

The legend is that if a child were to step into a fairy ring, then fairies would come and fly the child away. They don't live in them, they're more like portals.