Back when I was a kid one of my neighbor buddies told me about a strange toothfairy-like being (that I'd never heard of) associated with Halloween in his house. Unfortunately, I've forgotten whatever the hell he called it, but "Candyfairy" gets the idea across, I think. Basically, if he left a bowl of candy out after trick-or-treating, the "Candyfairy" (or whatever) would come and trade it for presents in the night. He came over the next day and showed me a game he'd gotten; I tested this myself too that same night after he'd told me about it -- my parents, of course, had never heard of this being either though so all my candy was still where I left it the next morning...