Really?  Did you know that while fairy tales are not true, they are also not possible to be true?
The Adventures of Pinocchio is my favourite!  It's so far-fetched and can't possibly be true!  Or can it?
I used to love being read fairy tales when I was a child. What's your favorite fairy tale?
Colloquially, a ''fairy tale'' or ''fairy story'' can also mean any far-fetched story or tall tale; it is used especially of any story that not only is not true, but could not possibly be true.