Summary: as if it gives them some structure, but basically the only real structure comes from the air you fill it up with at the end. Otherwise it was like building a crepe out of smaller crepes. Here are all of the corners locked, with the fabric strip around the outside. I was never sure if I get the fabric strip just right or not, but it is a piece of fabric for gosh sakes, and I
Image Dimensions: 500 x 375
Image originally found here.