Fairy Tales are the magic stuff of childhood fancy and an exceptional example of how far the imagination can take us.
Fairy tales may vary in mood (dark, comedic, daring), theme (love, lose, betrayal) but certain elements remain the same what all fairy tales have in common is magic seeped in folk lure.
And though it's sometimes hard to make clear the line between average high fantasy and the fairy tale genre google sums it up fairly well:
noun: fairy tale; plural noun: fairy tales; noun: fairy tale; plural noun: Fairy tales; noun: fairy story; plural noun: fairy stories
A children's story about magical and imaginary beings and lands.
Fantasy, fable "the movie was inspired by a fairy tale" denoting something regarded as resembling a fairy story in being magical, idealized, or extremely happy.
Check out wikis great write up on the subject