To get the players to sign in the right area, this is what I did for a friend's quilt. I cut the muslin squares and cut a piece of cardboard the same size as the square. Then I cut a window in the cardboard and told the folks to line up the cardboard and the fabric and sign in the window. Perfectly placed every time! And I found Pigma pens just a couple weeks ago in HobbyLobby. They're not with regular writing utensils but with the art supplies.