Free plans. Make a greenhouse, Pastured Poultry Pen (Chicken coop house), Cold Frame, Quad, ATV, Golfcart Carport mini garage shed, Banner Holder, row covers and more structural buildings out of PVC pipe. pvc plans has all the free plans for you. There are loads of projects and plans submitted to them as well, like this animal pen by by Shelley L Oney.
Free PVC plans to make loads of things.
Simple PVC Pipe Bows: A Do-It-Yourself Guide to Forming PVC Pipe into Effective and Compact Archery Bows
Black & Decker The Complete Guide to Greenhouses & Garden Projects: Greenhouses, Cold Frames, Compost Bins, Trellises, Planting Beds, Potting Benches & More (Black & Decker Complete Guide)