Easy Summary:Put grains in milk. Wait. Strain grains. Drink milk. Repeat. Got it?
http://www.9ghealthfoods.com/how-do-i-make-kefir
Since about 80% of illnesses begin in the G.I. track, it makes good sense to drink a probiotic beverage, such as kefir. Sandor Katz, writes in Wild Fermentation that “You can kefir fruit or vegetable juice, or water with any sweetener you like, or rice milk, soymilk, or nut milk. Cranberry juice dyed the grains red and Gatorade (!) left a neon blue stain. Whatever the medium, the grains seem to transform it, though they do not rapidly multiply as they do in milk. The process is exactly the same as kefiring milk.”
To acquire your grain, check with the local health food store to see if they know of anyone in the area that makes kefir and would be willing to share. You may also check online for local groups, such as Yahoo, that share grains. Or, you can also buy them from individuals selling on eBay. Hopefully, you will not have to pay for one. But if you do, the price should be under $10 (including shipping). Then, once you have a grain that multiplies, be willing to share with other enthusiast.