Wash and dry a sea shell (mine is about 3" X 3.5"). Drill a small hole for a hanger. Glue on or paint a little picture on the inside of the shell, then let it dry. Using a light touch, feather some metallic paint on the edges all around. Paint the back, then wipe it off for an antiqued look. Thread a little cord or wire through the hole in the top. Initial and date the ornament.