Every guest is given a babydoll upon arriving. If they set it down, someone else can pick it up. Person with the most babies wins. Sarcasm 101: The Rubyspikes Guide to Hosting a Baby Shower That Doesn't Suck
Birds and Soap, Soap and Birds: "She's About to Pop!" Baby shower game - balloon under there shirts, and hold a ping pong ball in between their knees, and waddle over to a jar that they have to drop it into.