Baby Bingo involves handing guests colorful cards with baby-themed pictures: a crib, a birth certificate, stroller, baby blocks, etc. The hostess acts as the "caller," and guests mark off corresponding items on their cards. The first person to get five in a row and yell "BABY BINGO" wins. There are 2 squares on each card which allow each guest to write in the name of the mom-to-be and her (expected) due date.