This one is a variant on an old game. To play, you will need a couple of rolls of toilet paper.
Ask your guests to unroll an amount of toilet paper that they think will fit exactly around the mom-to-be. After everyone has their paper, explain that the person who is closest to being right is… not the winner. Instead, each person should say one nice thing about the mom-to-be or one piece of advice for each piece of toilet paper on their strip!