This beach project is a sort of natural version of glitter designs -- except unlike glitter, your supply of sand is practically inexhaustible.
Cut a sheet of construction paper so that it fits inside the box lid -- this will be the portable canvas.
To make a picture, draw with the tip of the glue bottle, then sprinkle on loose sand.
Once the sand is dry, shake off the excess by gently tapping the side of the lid.
For added detail, glue on shells, pebbles, sea glass or any other not-too-aromatic finds.