As a take-off on weddings with baby pictures of the bride and groom, so goes this retro baby shower theme. This works especially well when the sex of the baby is unknown to capitalize on both the male and female aspects. Decorate with baby pictures, old clothing and memorabilia of the future Mom and Dad.
For instance, if the future Mom and Dad were born in the 80’s, further decorate with that era in mind. You might even do a before vs. after (i.e. 80’s vs. 2000’s) decorative theme. Good luck and have fun!