Construction cake I made for my son's birthday party by Elizabeth Nehemias Cut cardboard box lined it w/ wax paper caution tape. Baked cake in 9" round pan. Excavated small hole from top put it on the other side of cake. Transferred cake to job site. Iced it. Ground = brown sugar, cocoa powder, butter cream icing, Demerara sugar. Food processed cookie part of Oreos for dirt piles. Placed CAT machines (5 pack $6 @ Target). Topped w/ chocolate candy rocks candy corn construction cones.