FILTER.
A blanket to sit on. We have some supplies (drinks, including water, food), but if you want to bring something specific to eat or drink, please feel free. If you want to try to build a sandcastle, you could bring some of those sand toys, and we could try to build some kind of structure. Maybe some extra lights in case it's a little too dark to see easily at night, especially if we build this sandcastle at night. If you want to stay the night, or you think you might fall asleep if you get comfortable, I'd bring a few extra blankets to be safe. And anything else you think you might want or need.