When I was young, I would get a stack of books from one of my uncles every year for Christmas. Dragon Fall is one of the earliest books I can remember getting that way, and I remember writing a book report about it when I was in fifth grade. I still remember trying to explain it to my horrified and confused teacher and classmates.
Gabe makes toys. Gabe makes some toys that are dragons. Gabe's dragon toys apparently come to life and pursue their own agenda. Gabe does not witness most of this first hand until near the end, but something odd is obviously going on throughout the story.
When I was 10, I found the book riveting. I didn't understand some of the words or what was going on at times, since the book was aimed at teenagers and I had a rather sheltered childhood. Still, I thought the cover art was awesome, the idea of making toys for a living sounded awesome, and the idea of one's creations coming to life and trying to murder you had a sort of dreadful fascination. It was funny and exciting and I totally loved it. I reread it many years later when I could understand everything that was going on and it was still a fun read, though obviously flawed in some ways. I suspect that now I might be even less impressed by it, but it was written by a teenager in the 80's for other teenagers in the 80's, so I'd probably be a bit forgiving of its shortcomings.