I've had a lot of questions about this diaper cake from the shower.
It IS made completely of diapers (and rubber bands)!
Here's a quick illustrated tutorial (because of course I didn't take pictures as I was experimenting).
Pumpkin Diaper Cake
You'll Need
Diapers (see below for details)
Rubber bands - thin larger ones are better
Orange Tulle
Brown Tulle/Fabric Scrap
Green Wired Ribbon
Step 1: Pick your diapers. I used Pampers (mom's choice) in sizes 1 and 2 (per mom's request). Really the size and pattern of diaper don't matter as they'll be covered with tulle for this cake. I ended up using about one box for this project (some 1s and some 2s).
Step 2: Roll your smaller diapers. Leave them folded, and start from the open/top end. Roll toward the crease. This seems to hold the diapers in place better. If you're making a cake without tulle, it'll give you a pretty white diaper (with most brands).
Step 3: Add a small rubberband around each diaper roll. I do about 10 of these at a time before going to the next step.
Step 4: Bundle about 5 diaper rolls together and start forming a circle for your cake.
Step 5: Add 1-2 big rubber bands around your large bundle. This can be as large/small as you'd like. There's no real exact number count it has to be.
Step 6: Stack two bundles of approximate equal size on top of each other. Don't try to line them up like in the illustration, because you'll go crazy. Stacked is good enough.
Step 7: Add bulk to your pumpkin to make it more of a sphere instead of a cylinder. Use rubber bands to attach 1-2 rolls to the stacks. Just mess with them until they look right. That's the real secret to this project. When in doubt, add more rubber bands.
Step 8: Take your larger diapers (still folded but not rolled) and layer them around the outside of your cake, overlapping so you can't see the rolled diapers. Tuck the bottoms under the cake and use rubber bands to secure. You may need one rubber band toward the top and one toward the bottom.
Step 9: Do the same to the top so you have a pumpkin-shape. If it still looks like a cylinder, add more rolls under the flat diapers or flat diapers in the middle area.
Step 10: Wrap the diapers in tulle. I found that wrapping North and South worked best. This takes a LOT of tulle to get an opaque look-just fyi.
Step 11: Add a stem to the pumpkin and tie green wired ribbon around the top for the vine. I used one diaper roll covered in brown tulle. I just worked it down into the top of the pumpkin.
Ta-da! Sorry for the illustrations instead of actual photos.