My sweet neighbor Anna (baby Peter's mom) just gave me some of her kefir grains...
1 quart milk
1 tbs kefir grains
fill jar with milk, add grains and cap loosely.
leave at room temp for up to 24 hours, agitating jar periodically. Milk will become bubbly, then coagulate and separate. Remix by shaking.
refrigerate or let kefir to continue to ferment if you want sour cream and whey.
store grains in fridge or freeze them if you can't keep up with the kefir.
Let me know if you want some grains....
My kefir info. comes from"Wild Fermentation"- Sandor Ellix Katz