There's another kind of fermentation: beer. I learned to make my own beer last summer. The first few batches were barely drinkable, but I'm glad I didn't stop there. I'm getting pretty good by now. The process is rather simple once you get a hang of it, but it does require patience: 6 weeks for most ales, longer for lagers (which I don't brew because they're harder to get right, and IMO not as tasty). It's also incredibly therapeutic, for me at least, especially if you drink a couple of cold ones from an older batch on the brew day. Relatively cheap and satisfying hobby. All you need is a large stock pot (4 gallons), 2 3-gallon glass carboys, 5 gallon cooler from Home Depot, gravity pump, some nylon bags (large for grain, small for boiling hops), and coiled copper tubing chiller. Sub-$250 all in all. With this primitive gear you can make ~2.5 gallons of beer every 2 weeks once you establish the pipeline (which takes 6 weeks).