Do your shower guests know who's baby this is? Have your baby shower guests guess who's baby is who's. When sending out invitations make sure you include a self addressed stamped envelope and ask guest to send a picture of themselves as a baby. Inform the guests their pictures will be returned. Or you can have them send a color photo copy of a baby pictures. Make color copies of all the pictures and glue them to a poster board. Arrange them in random order. You can decorate the board with other baby related items. Have your guests try to guess which baby is who. Give a baby shower party favor as a prize to the winner.