Some of my favorite stories have a youthful hero stumble into a fantasy world and experience big all kinds of adventures: The Neverending Story by Michael Ende, Little Nemo in Slumberland by Winsor McCay or Brave Story by Miyuki Miyabe.
I completed a short story in a similar spirit with a little help from Clay Gardner, and you can read it here.
It started out with a small request: I wanted to stray away from my usual color work to do a couple of grayscale toned manga pages and asked Clay to write it. The original plan was to have no more than 4-5 pages, but the thing just kept growing in my mind as I read through the script. I was hooked. Once I got started, I finished the whole comic in little over a week.