First off, Congrats! (Pampers is the brand of diapers I swear by; Huggies for the pull ups) (Oh and get one of those dollar fifty baby nail clippers - life saver)
LI, she shouldn't be dong her own shower but I understand cause I was doing my own shower the second time around myself. Honeydip please don't go crazy.
Well you got the clothespin game...everyone get one pin (or three) and whoever says baby throughout the whole party gets a pin taken if the other person hears them. At the end person with the most pins win.
At my oldest's shower moms made some blocks with her name and jumbled them up, and whoever could spell her name right got a prize.
Make a search word / cross word / word jumble
Oh the how big is my belly contest. Get some ribbon, that crepe paper banner stuff, something long. Everyone get to cut a piece to see who can come closest to the actual size of your belly.
That's all I can come up with right now.