Okay here's a question. I am wanting to make a cake shaped like a packing box for a housewarming gift. I want to have the box open, so at least 2 of the 4 "lids" will be open. How do I achieve this without them falling off, or bending. I know I can use gumpaste to prevent the bending, but how will I attach it to the rest of the box so it won't fall off?