My two boys and I built a bike rack out of PVC pipe. We used a design I found online, got some supplies at Home Depot, and got to work.
It cost about $45 in parts, some of which I can get back because I didn't end up using the PVC cement. It was a fun project and really uncluttered our porch.
The hardest part: cutting all the pieces of pipe to the correct size. It's not especially difficult, just time consuming. Also, the PVC shavings that my saw made left a snowstorm on my porch. I tried to convince my wife it made the place look like a winter wonderland.