There are a few variations on this game out there, so if you find different versions online or among friends, feel free to select the version that works best for you.

One variation goes as follows: Start out by filling a baby tub or a wide bucket with water, then place a floating rubber duck or other bath toy in the tub - one per guest. On the bottom of the floating toy, place a red or black dot with permanent marker. Have each guest take one as they enter or prepare to leave. Whoever gets the floating toy with the dot on the bottom, wins!

Another variation is to place a sticker or dot on the bottom of a plate and whomever has the plate with the sticker or dot on the bottom, wins. This can also be done if you are in a venue with folding chairs so that whoever has the dot or sticker on the bottom of their chair is the winner.

Door prizes are always fun, because there's no effort involved in winning--making it kind of an extra added surprise gift for the winner. This one has the added benefit of being baby-themed.