Pick up a set of clothes pins, we found a cute set of mini plastic pink and blue pins. Get enough for one per guest.
Give a pin to guests as they arrive. Have them pin it to their sleeve. Instruct them to ‘steal’ a pin from someone when they say the word BABY.
At a pre-determined time during the shower, award a prize to the guest who has the most pins collected.
Also works well for baby showers where men are present too.