I did this cake. more than once. And I covered styrofoam with fondant. I am sure it could be out of cake. But, the styrofoam is easiest.
Hope this helps
i was going to say the same thing, styro would be alot easier, and firmer and better at being supported. I suppose you could use cake if you REALLY wanted to, but just to make sure its well well supported with something or other, i dont imagine dowels would do the job well enough without causing weak spots n making it sag
I don't see why you couldn't use cake. It's not on too big of a slant. Just make sure you glue it to the board with some frosting. Seems to me it work out just fine.
I used cake when I made my jewelry box lid. I put the cake on a board and doweled on the back through to the bottom board. I think I used two one at each end. the dowels holding the lid open were about an inch taller than the bottom cake. they were also on each end about in the center. I transported it about 7 miles to work with no problems. It's not in my pics but the shoebox is and it is similar.
I just made a treasure chest to go on top of a cake, and I used rice krispie treats to make the lid. I stuck it in the fridge after I molded it, then smoothed on a layer of buttercream and then put the fondant on. I stuck a dowel through the bottom of the chest to prop it open. You could put the RKT on a board since the toolbox lid is big, for extra stability.
I hadn't thought about using styrofoam - that's a good idea for me, especially since it needs to travel quite a bit. Thanks for all the replies!