I’ve been in lots of different kinds of forts. Tree forts, snow forts, couch cushion forts. Some kids down the street built their snow forts out of 2×4 lumber and fiberglass roofing material. They then covered it with a layer of snow that they sprayed with water and then covered with another layer of snow. My couch cushion forts were not nearly as strong as that. But I guess it was always fun jumping on top of them to destroy them.