Kombucha... it strikes awe and curiosity and disgust in its drinkers.
What is kombucha? It is a culture of bacteria which eats sugar and tea, fermenting it into a lovely and lively liver tonic and all around feel good drink (in my opinion!) See my post from 2011 about kombucha here: http://rhizomefarms.blogspot.ca/2011/05/kombucha.html
If you're looking for a kombucha scoby, i would
ask around your community. I used to have a kombucha mothers coming
out of my ears until i gave them all away via craigslist/freecycle.
Because these cultures reproduce on their own, as long as the scoby is
well cared for, its easy to get a live, healthy scoby for free.
Check out Food Renegade's post on Scoby cultures!:http://www.foodrenegade.com/kombucha-scoby-experiment/