Put a picture of the beach you visited in a shadow box frame and fill the bottom with sand from that beach. Much neater than a random jar of sand and shells! decorate the frame or put seashells or treasures found on the beach in the shadow box
Craft Closet idea- you have no idea how happy and delighted this would make me. You also have no idea how I could never ever pull this off and maintain it. Simply not who I am, but man does it make me happy to look at it and dream!