This is my son's birthday cake. He is turning two and loves "Bob-Bob". I used an internal pvc pipe structure. It's four sheet cakes cut in half and stacked on top of each other. It's huge. Only problem is that I forgot to put supports in between each section...so I'm anticipating it collapsing some time before the party tomorrow. How does a person forget to put supports in? I'm shaking my head in shame. "Dear God," please don't let my cake collapse because of my own stupidity." Fortunately my son is only 2 so he won't be able to use this against me in the future...hehehe