Sheetfort. Jagular. Fact.
There was maybe no cooler thing ever.
I used to emplu my baby sister as first foreman, and over the course of hours, we would end having the entire fucking house under a series of sheets and blankets.
Corners of sheets tucked under the television, flung over sheet music stands (the only real good use for this contraption), swung over to a door we would close with the sheet tucked into it, over to the couch, that would be a sleeping quarters.
I have built one of these in my own home as an adult actually, without my child, and it was an amazing evening.
Lean into your childhood.
It serves up memories that can ONLY make you feel, well, THAT way.