It's a vocabulary-based website. You give the correct definition of the word, and they give 10 grains of rice to someone in need. It's educational for you, and potentially life-saving for them. This thing proves how much of a nerd I am. I started doing it to help someone, but after a while, I noticed the vocabulary level, and now I'm hooked. I'm determined to try to get past level 48 [Approx. the highest anyone can make it without a dictionary] without cheating. I've only reached 38 so far. Bah, it's still higher than anyone else I know. Plus, it's more than 16,000 grains of rice.
Epic win for me.