Boy/Girl under the sea party. I used beach sand as a center piece for each table. Glass cylinders filled with floral water crystals and LED lights to create the effect of coral under the sea. Unfortunately the lights didn't show up nearly as colorful as it appeared on the product picture when I ordered these. Treasure chest favor boxes. Starfish shaped place mats for the girl table and fish shaped place mats for the boys table. I tied a balloon to each chair to achieve an under the water feeling.