Human: I want to know what the best way to make a sandcastle is. Assistant: 
The best way to make a sandcastle is by using wet-dry sand, which has a higher moisture content than regular sand and therefore holds together better when wet. You can also add more detail to your design by adding shells, stones, or other decorations. To help keep the castle intact, you should use plenty of water while building and then let it dry in the sun before removing it from the beach.