I'm so glad you mentioned kefir! Lots of people have no idea what it is. My roommate in college used to make it all the time - every morning he'd have more kefir, and for maybe 2 minutes of work a day.
Yogurt is also extremely easy to make - just put a spoonful of yogurt in a smallish container of milk, and wait. It's also pretty easy to add things to, just like kefir. Fresh yogurt often tastes way better than storebought, and you know the bacteria are active!
Yogurt is also extremely easy to make - just put a spoonful of yogurt in a smallish container of milk, and wait. It's also pretty easy to add things to, just like kefir. Fresh yogurt often tastes way better than storebought, and you know the bacteria are active!