My last baby shower I made a diaper cake-
-roll up diapers
-tie with ribbon or string(whatever you have)
-built your layers with the diapers
-tie each layer with ribbon - (you can make it as high as you want-1tier, 2tier - i made a 3 tier)
-insert a baby bottle in the middle
-then attach with ribbon all the different items you want
(i attached bibs rolled up/rattles/baby nail clippers)
anything to decorate your cake

was a big hit!

Dominique