such a cute idea for a party - we could make a heart shape out of your engagement and 'while we were dating' photos as part of the rehearsal dinner decor. This could also be added to the wedding day decor, placed on an often overlooked area - like on the gift table, perhaps.
Make a sign & a table with blank paper & note cards for people to write a special letter or birthday message. For 1st birthday ideas could be: when you heard about baby's arrival, your first meeting, early impressions, future wishes, a note of blessing, your favorite photograph(s) with comments. Could make a tradition for each year or just do for 1st birthday & do a time capsule.
Let your child wake up to pictures hanging from the ends of balloons to highlight special times over the past year. If it’s a 1st birthday party, hang pictures marking each monthly birthday to see how much you’re baby has changed during their first year.