Cool! Buy plates from Dollar Store, write things like, Night Before Christmas, wedding vows for a gift, happy birthday song, the possibilities are endless :) Please note, they used a Porcelain 150 Pen which is permanent and safe once baked for 30 mins in a conventional oven.
DIY food face plates. I think I'll make mine using a glass plate and draw on the back, so the paint doesn't come in contact with the food. Or print out & laminate several funny cartoon or other faces and just lay them under the glass plate. Hey presto, chango!