These everlasting ornaments will evoke memories of your wedding for years to come. They're ideal for a seaside affair. Handpick shells from the beach, or buy them at a craft store. Look for ones that coordinate with the groomsmen's attire, but keep in mind that the shells don't all have to be the same. Use a hot-glue gun to attach a pearl-head pin to the back of each shell. Add a ribbon bow or loop if you wish.