I'd like to direct your attention to a fun little business run by Suddenly Sahm's mom:
Carol's Music Boxes:
Her handmade music boxes come in two sizes and you can probably choose from existing inventory or give her the specs for a custom designed one. I'm giving these to the boys' teachers this year for a holiday gift. The one with the poinsettia plays "Deck the Halls" and the one with the Santa plays "Up On The Rooftop".
Reasonably priced, unique, handmade, and fun. Oh, and endorsed by Suddenly Sahm.