The document provides instructions for building a sandcastle at the beach. It outlines the necessary materials which include different sizes of shovels, buckets, water and optional decorative items like seashells. It describes preparing the sand and choosing a location away from others. The steps include making a foundation, digging a moat, using buckets to form walls and connecting them with shoveled sand. Decorations like windows, doors and roads are added using shells and a shovel. Finally, the moat is filled with water and markers are used to defend the completed sandcastle.