A sandcastle is a structure made from sand, typically built on a beach. It is created by wetting the sand to help it stick together, then shaping it into various forms, often resembling a castle or other imaginative designs. Sandcastles can vary in size, from small mounds to large, elaborate constructions. Building sandcastles is a popular activity for children and families during trips to the beach. It encourages creativity and teamwork, as people often work together to design and construct their sandy creations. Tools like buckets, shovels, and molds can enhance the building process, making it easier to achieve detailed shapes.