What about the old memory type game? You bring out a tray with several baby items on it and let everyone look at it for a minute. Then you remove it from the room and have everyone list what is on the tray. Whoever gets the most right wins.
I did have a cute decoration idea. I've done this in the past at baby showers and it is always a hit. If you are having a punch bowl, use a round wreath ( any type of greenery) and tie pacifiers, rattles, little socks, etc into the wreath. It looks really cute and the guest of honor can take all the little goodies home with her. You can also do this with a garland that you lay out across the table top.