I like your ideas, too! I might have to end up writing this myself, though it will no doubt be done in fits and starts. I really wish real life didn't cut into my fannish life so much, you know? So very annoying!

Just did a little quick research, 'cause I have a lot of books on the subject, and apparently yes, even elementary school-age children do get fibromyalgia. But I'll bet it's the kind of thing John wouldn't both to take Sam to a doctor about, considering it seems like they have to have major, visible trauma in order before going to the hospital. So...interesting ideas swimming around in my brain now.