
Just a seed of an idea - dogs dressed in Dickensian style clothing like paper dolls on cardboard cutouts with a notice saying you want to donate the prize money to the local dogs home? or something with poochy pictures. For cardboard cutouts I'd use a printer, cut out the figures I liked and glue them onto posterboard.
Or, maybe just a scene from a story like the Christmas Carole. An old junky childs chair with a doll or stuffed dog dressed up like scrooge could be asleep by a fire with some spirits hanging down from the ceiling. I'm off on a waffle now!