I stumbled upon the pages for the old mass-market RPG-light boardgame
HeroQuest, which I loved back when I was somewhere between 7 and 10. I created a lot of scenarios for the game myself. I remember one friend showing me the quest book from the expansion he had but never got the chance to play them. The manuals are linked from the above pages, and I've spent an evening going through them, reminiscing, and imagining how they might have been.