Nope, not being sarcastic. Basically, you roll up a diaper or two, secure it/them with a rubber band, and repeat, many times. You tightly stack them vertically next to each other to shape them into a circular cake layer. Once you have enough to create the base, tightly wrap with ribbon, and then glue the ribbon ends together. Then, you stuff more rolled diapers in that layer to fill it out. You would repeat the previous steps for as many cake layers as you want. Then, you pick up things to decorate the top of the cake (rattles, booties, stuffed animals, toys, etc…) and you can decorate the face of each layer (such as to conceal the glued ribbon edges on each layer). For this, I buy various items, such as painted wood items from Michael’s (e.g., ducks, trains, puppy dogs, etc…). To save time and money, I may buy round styrophone (or a more environmentally friendly material) the next time I make a diaper cake to “fill” the middle of each layer, with the thought that rolled diapers will only be needed around the edge.
I have many pics, but they’re all on my cell phone. If I can figure out a way to get the pics from my phone to my computer, I’ll post them. I can’t seem to get an internet connection with the phone and it doesn’t look like there is a way to plug it into my computer.