My son's birthday is in December.  The weather is terrible for a party.  For his fourth birthday we had a Couch Potato Party. All the guests came in their pajamas. We began the party with a short movie while they snuggled in bean bag chairs and on the couch.  We served popcorn in little brown lunch bags and drinks. After the movie each child painted a pillowcase with potato stamps. (We cut potatoes in half and carved designs such as moons, stars, etc.)  The pillowcases dried while we ate and opened gifts.  Each child took theirs home.  We served a Mr. Potato Head cake and potato ice creams. I softened ice-cream and formed it in the shape of individual small potatoes and refreeze. I then rolled them in graham cracker crumbs.  They looked just like potatoes. We served them with "sour cream" (cool whip), "butter" (a tube of yellow frosting) and "salt and pepper" (a shaker container of sprinkles.