<human>:  How to make a sand castle with a moat?
<bot>: To make a sand castle with a moat, start by laying down a base layer of wet sand. Use a bucket or your hand to form a wall around the base. To make the moat, dig a shallow ditch around the sand castle with a shovel. Fill the ditch with water and allow it to settle. Add layers of sand to the walls, packing it down and shaping it as you go. Top the castle with decorations such as flags, seashells, and rakes for walls. Make sure to pack the sand firmly around the decorations to make it extra sturdy.