I suppose if you look back to your early childhood you accept everything people tell you and that includes a heavy dose of irrationality - you're told about tooth fairies and Father Christmas and things.
There may be fairies at the bottom of the garden. There is no evidence for it but you can't prove that there aren't any so shouldn't we be agnostic with respect to fairies?
I believe in everything until it's disproved. So I believe in fairies the myths dragons. It all exists even if it's in your mind. Who's to say that dreams and nightmares aren't as real as the here and now?
I had to act in a school play when I was about ten years old. I really didn't want to do it. But everyone had to do it so I didn't have a choice. A talent agent came and watched it and later gave me some work. It's funny because I'd always known that I wanted a movie career. I just didn't think that I would be in the movies.