When I started making box forts for my library program, the Early Literacy Fair, I didn't have the luxury of storing forts in the middle of the room because I didn't have any place to put them at the library and I couldn't store large forts at my house either. So, I needed to devise a way to make a fort that folds up for easy storage behind my cubicle at work, behind the couch at home or under a bed.
This is what I came up with. The forts fold up like accordions and I can stash them in tight spaces at work and at home. I love box forts for imaginative play, creativity and to help set the scene for social interactions. Here is a link to the PDF instructions.