Sometimes it feels like you’ve known your sweetheart all your life. You can have fun creating the sense that’s trust, that you have known each other your whole life.
Find a double picture frame, one which holds 2 pictures.
You & your sweetheart each get a copy of one of your own baby pictures.
When you have 30 minutes for just the two of you, work together inserting the pictures into the frame. While doing this, share as much as you know/remember about that picture.
And if you find a quad picture frame, include a recent picture of each of you along with the baby pictures in the frame.