A ball will be held in the castle of the underwater kingdom today. In the game Mermaid Underwater Sand Castle Deco, you will help the mermaid princess to clean the castle. In front of you on the screen you will see a playing field on which objects will be scattered. You will have to carefully examine them and find debris. You will have to collect it and then place it in a special container. After that, you will have to go to the princess's room. Here you will help her with makeup and then styling her hair. After that, you can choose an outfit for her from the suggested clothing options. You can already choose jewelry and other accessories for the outfit.