Step 4: Attach Bags & Fabric Top
I attached my bags with some plastic clips called Snap Clamps. These clips are great because they allow you to easily clip fabric onto PVC pipe. The bags can be removed and washed when they get smelly or need to be changed.
My wife found some discount fabric that we laid over the top, pulled tight, snapped on with snap clamps and then fasted with a few safety pins (so that the excess fabric didn't flap around).