If you set aside several hours on three days to make the house, that will allow plenty of time for all the icing to set firmly and plenty of time for you to have some fun. The completed house can stand for up to one month.
Dough
6 3/4 cups all purpose flour
4 1/2 teaspoons ground ginger
1 1/2 teaspoons ground cinnamon
1 1/2 teaspoons baking soda
1 1/2 teaspoons salt
3/4 teaspoon ground cardamom
1 1/2 cups solid vegetable shortening
1 1/2 cups sugar
3 large eggs
3/4 cup robust (dark) molasses
Sift flour, ginger, cinnamon, baking soda, salt and cardamom into medium bowl. Using electric mixer, beat shortening in large bowl until fluffy. Add sugar and beat to blend. Beat in eggs 1 at a time. Add molasses and beat on high speed until well blended. Add dry ingredients in 4 additions, beating at low speed until dough forms. Divide dough into 6 equal pieces. Flatten each piece into rectangle. Wrap each in plastic and refrigerate until firm enough to roll, at least 6 hours. (Can be made 1 day ahead. Keep refrigerated.)
Rolling, Cutting and Baking
Each of the six pieces of dough will be used for one of the large sections of the house (the two side walls, the front and the back walls, and the two roof sections). The scraps will be rerolled to make the roof tiles, trees, stars, figures and other cookies for nibbling.