A sandcastle is a structure made from sand, typically built on beaches. People use water to help mold the sand, making it stick together better. Sandcastles can range from simple piles of sand to elaborate designs with towers, moats, and intricate details. Building sandcastles is a popular activity for children and families during beach outings. It encourages creativity and teamwork, as builders often collaborate to create larger and more complex structures. Sandcastles are usually temporary, as they can be easily washed away by waves or destroyed by wind.