I'd riff on fairy tales. Someone ate a gingerbread house, and came down with shingles from eating the roof. There's a shortage of dwarves, meaning that princesses have to make do with less than seven (in fact, it turns out that some of the less well off princesses might be using children, and not dwarves). Labor laws found out about the elves in the shoe factory. Pigs have stolen all the straw to make houses from.