This summer I have been helping my mom decorate the "play room" for the grandkids. We decided that we wanted a little screen for the kids to change behind when they play dress-up. At first I envisioned a painted plywood wall, but I remembered how kids like to knock things over. And then I envisioned a trip to the emergency room to suture a dressing-room-induced wound from it being pushed onto one of the kids. Not such a good idea after all.
And then I remembered PVC pipe. It's light, easy to cut, has ready-made joints, and rarely injures people (unless you make a potato gun out of it, but that's entirely different.) So I headed to Lowes and concocted this frame, using four 4' segments, two 2' segments, four 1' segments, four t-joints, four 45 degree joints, and four 90 degree joints.