My twin girls were a pair of shoes last year that really turned out cute.
They wore 1-piece fuzzy footed jammies. I attached small plastic rings (WalMart craft dept) to their fronts and "laced" them with big laces (WalMart craft dept).
They wore white hats and turtlenecks (Minnesota). I wrote Reebok sideways on their fronts and painted 3 stripes on their cheeks.
On the back I attached a big grey felt piece, drew wavy lines across it, and added a chunk of pink felt to look like there was gum on the bottom of them.
Thanks to Julie for this great idea and terrific photo!