Fill a large tray with things for the baby. Show the tray to the guests for about 15 to 30 seconds depending on the number of items. Remove the tray and have guests write down the things they remember. The guest who remembers the most items, wins.
Here are items you can put on the tray (which, of course, is given to the mother after the game):
diaper pins, cotton balls, cotton swabs, baby wipes, pacifier, bottle, nursing pads, bib, rattle, nasal syringe, medicine spoon, baby bootie, baby cap, spoon, board book