Take a 3x5 card and cut some white/muslin, whatever into 6 inch squares. Carefully center the 3x5 card and wrap the fabric around it. Tape it on the back. Then, have everyone at the wedding and reception sign a block. By taping the fabric to the back, you'll have enough area for seams and the signatures won't end up IN the seams. You can then take the signed squares and make the newlyweds a quilt from those. It's really a nice keepsake quilt. Even if you just put sashing between the blocks, it makes a really nice looking quilt.