I have made my son, Jack, many costumes that have been based on his name (lumberjack, jack-in-the-box, jack and the beanstalk) but last year's was my favorite!
The costume was made primarily of felt. I purchased a rectangular piece of Styrofoam from a craft store to be the top of the box. I bought tan-colored felt long enough to cover from a little over Jack's head, to almost the floor, then added about 18 inches for folding at the top. The felt was glued along the long side to form a tube that the Styrofoam fit into snugly, and then pressed (carefully) to create the four corners.
I folded in the top of the felt (like wrapping a gift) and covered that with a piece of white felt designed to look like a bar code. The rest was drawn on blue, white, and red felt with sharpie markers and everything was glued with hot glue!
I altered the package design so that Jack's face would be the face of Sailor Jack. We cut the lids of 2 copy paper boxes to fit between Jack's shoulders and the top of the "box" making sure that his face fit into the hole, and we rounded out the lids to sit on his shoulders. I also cut slits so he would be able to put his arms out.
Coolest Cracker Jack Box Costume - Back of costume
Coolest Cracker Jack Box Costume - Left side of costume
Coolest Cracker Jack Box Costume - Right side of costume
I made a home made cracker jack box costume. Took a cardboard box and blew up all the details of the cracker jack box and attached them to the box. I also printed out small prizes and handed out boxes of cracker jacks.