Take a walk together on the beach and collect some interesting shells to decorate your candle. Purchase a plain white pillar candle (a 3 x 6-inch size works well). Using a paint brush or Q-tip, apply white craft glue all over the candle. Spread some sand out on a newspaper and roll the candle back and forth in the sand until the candle is covered. Allow the candle to dry overnight so the sand forms a hard crust. Glue shells to the candle to complete the beach effect.