<human>: Is there a way to make a sand-castle mold so that it can be used over and over again?
<bot>: Yes, you can make a sand-castle mold by using silicone molds. Silicone is a material that can be used to create molds for casting materials such as sand or concrete. You will need to mix the sand with water and then pour it into the mold. After the sand has set up, you can remove the mold from the cast.