What you need:
Blue pants, button-down shirt, and cap
Three small stuffed dogs
Small messenger bag stuffed with a few pieces of old mail
Red, blue, yellow, and white craft foam
From the inside of the pants, pin two stuffed dogs by their mouths to ankles. Attach a dog to the mailbag as well.
Using craft foam, create a U.S. Mail badge, and pin (or glue) to shirt pocket. Cut out letters from craft foam and glue "U.S. Mail" to cap. (Our model wore his backward!)