A design wall is an absolute must for me. I got two pieces of foam insulation board (4' x 8' each) from the builders' supply store. First I cut two feet off the end of each since there's nowhere in my house where I can stand up something 8 feet tall. I hinged the two big pieces together on the now 6' edge with duct tape and also bound the outside edges with duct tape so the foam wouldn't fall off later. I covered the entire thing in a flannel-like fabric. (And yes, there is a seam, but that's not a problem.) Now it will fold in the middle and slide under the bed when it's not in use. I did the same thing with the two smaller pieces I'd cut off, hinging them on the 4' edge, covering with flannel. That gives me a smaller design board that will fit into my car and can be taken to classes, retreats, etc. Two for the price of one!