Fantasy and children's books

A lot of people seem to assume that fantasy is only for children, and that adults who read it are somehow inferior - escaping reality, refusing to grow up etc. I've complained about this before. However, yesterday, when I was once again struggling to classify some new children's fiction, I started thinking a bit more about the fantasy genre, and, in particular, the different way fantasy is treated in children's and adult books.

( How fantasy is treated in children's and adult books )