I want to make a cake shaped like an open trombone case. How do I make the case top stand up? I didn't see an article on this. Thanks.
I'm not sure how others have done open boxes, but some may use cardboard/rkt/styrofoam covered in fondant/gumpaste? But to hold it open styrofoam will be the lightest I think, using dowels? I hope someone who has done this can help you!
What did you end up doing? I'm trying to do an open laptop and I'm afraid my lid is to heavy for just the dowel rods. I used styrofoam.