A guy at the laundromat told me my fort walls looked "sad and floppy" so I tried his trick
I used to just drape sheets over two chairs and call it a fort. Last month this older guy at the laundromat on 5th saw a photo on my phone and said the walls were "sad and floppy." He told me to clip the corners to the chair backs with binder clips first, then drape. I tried it with 6 clips and the whole thing held up way better. My kid napped in there for 2 hours instead of the usual 20 minutes. Now I keep a bag of clips in the linen closet. Does anyone else use clips, or is there a better way to keep the sides from sagging?