You need a large jar, a pile of seeds and a bunch of water. Basically you just pour water into the jar, drain, wait 8 hours, repeat. After a few days, you have sprouts. It's the easiest thing in the world.
I bought my jar with the nice drainage lid and a bunch of different seeds from The Sprout People. I think you can do it with cheese cloth instead of the sprouter, but a sprouter doesn't cost much and it will keep the Sprout People in business
www.sproutpeople.com