Building a sandcastle is a fun activity often enjoyed at the beach. It involves using wet sand to create structures that can resemble real castles, towers, or other imaginative designs. Tools like buckets, shovels, and molds can help shape the sand, while water is used to make the sand stick together better. To start, builders typically find a suitable spot on the beach, away from the waves. They gather sand and water, mixing them to achieve the right consistency. Once the base is formed, they can add details like walls, moats, and decorations, making the sandcastle unique and creative.