Old jars filled with shells make lovely displays. Fill your favorite antique jar to the top with shells of different sizes. With pinking shears, cut a circle from a pretty piece of cloth and place it over the mouth of the jar. Be sure to cut it large enough so that you can pull it into a ruffle, then tie with jute twine or matching ribbon. You might even like to add a decorative craft butterfly or a seagull feather.
Seashells make wonderful wind chimes, too.
Drill a hole in the edge of several shells, string on fishing line or thin twine, and tie to a hanger. Be sure to space the strings of shells so that they don't tangle, and then hang in a sunny spot. Smaller, more delicate shells make fun refrigerator magnets. Using a hot glue gun or white craft glue, attach a small, sturdy magnet to the shell. You can even add some tiny dried flowers to the magnets.