Take any tile you would use in your home for a back splash and clean it off. Find a pattern you like (scrap book paper works the best) Cut the paper to size of the tile. Use a glue stick to attach the paper to the tile. Let that dry. Mod Podge the coaster. You will need at least 3 coats. Let it dry between coats. Spray the tile with a water proof sealer let dry. Mod Podge a piece of felt you chose and cut to size on the bottom of the coaster to prevent scratching.