My 14 yo daughter bought herself a utility knife at Harbour freight. It looks a lot like an old USMC K-bar on steroids, but has an interesting feature: the handle has a hidden compartment. It came with a little sewing kit and a pack of matches, but she has a line of other useful options laid out on the counter. Girlie contemplates the knife and says "Wouldn't it be cool if this were really a magical knife and the magical effects changed based on whatever you put in the handle?" Little did she know.....