The game started normally in a tavern, and turned strangely Salvador Dali-esque as my son's brain spewed forth with the imagination that only an 11 year old can wield. He far exceeded my meager attempts at being a DM when I was the same age. I had a lot of fun.
Crazy-Ass Tim has a wonderful report on our shared lucid dreaming session, which I suggest you check out. I don't think I could have described it any better.
Meanwhile - please enjoy the sketchdump below: