365 reasons why I love you jar. Both have their own jar and write once a day one thing they love about the other. On their anniversary/birthday/valentine's day/christmas/whatever the occasion, open the jar and read what the other person wrote
This is how I plan on asking the maid of honor & bridesmaids. Really cute idea. 5 Creative ways to ask: Will you be my bridesmaid? This photo is a DIY balloon in a box that you have to pop to find a secret message inside!