Here is my version of a diaper cake for a baby shower. I used 26 size 2 diapers.
Roll each diaper up and secure with a rubber band. Make two sets of seven rolls and secure with a rubber band around the whole group. Put twelve rolls around one group of seven and secure with a rubber band. (I used a mixed bag that had big and small rubber bands). You will now how two tiers.
I used wrapping paper scraps from the paper used to wrap the presents and made a stip to go around each layer. Add a stuffed animal to the top and it's done. This cake is a lot simpler than a many of the other ones on-line but still really cute.