I made a few random felt-bottom coasters, testing out different tiles and paper.
Top-left is Calvin Coolidge, 30th President of the United States, from Vermont. I ripped the picture from a bargain book of US Presidents that I have. Top-right is Mark Twain (obviously), picture is from a Dover clipart book. Bottom-left is sleeping kittens from a children's book. Bottom-right is central VT/NH from an atlas.