I wrote a collection of illustrated short stories called "The Adventures of Amelia" when I was about 6 (Amelia was irredeemably naughty and there were no educational morals, haha) and two novels when I was about 12 (one set in WW2 in occupied France, and the other set in a boarding school like the one I was at). Chapters used to be passed around class as I finished them. I had a go at SF and satire at 16 or so, but since then it was all internal story writing. I should have a proper go again. I have several unwritten novels, though one was heavily influenced by Gormenghast and Star Wars. :-P