Wedding details your guests can interact with can be especially fun and personal. We particularly love crossword puzzles for their versatility, ubiquity, and ability to get people talking and researching. They can serve as conversation starters for extroverts and as something to keep introverts happy and occupied. You can also use crossword puzzles as a way to help your families mingle and learn something about you that they may not have known.
Here's a simple crossword puzzle I made on ArmoredPenguin. You can easily customize the color of the blocks and the font. With some basic photoshop skills, you can turn it into a heart shape with a simple mask.
Make your own custom crossword puzzle at ArmoredPenguin.com/crossword/