A genre of speculative fiction, which creates an alternative universe existing on laws different than our own.
Fantasy is often rooted in traditional literature, but has an identifiable author.
In general, stories involve magic, the "quest," and/or "good versus evil."
There are many sub-genres: animal fantasy, quest fantasy, toy and doll fantasy etc.
Pure fantasy transports us to a different universe all together, but many subsets of fantasy bring magical elements into an otherwise realistic setting (Magical Realism).
Magical Realism is popular with young readers because they can see themselves in imaginative and exciting ways.