Free Rice for Vocabulary Words

There is a website: http://freerice.com/, where you can answer vocab. words and for each word you get right, 20 grains of rice are donated through the United Nations to help stop world hunger. IT doesn't seen like a lot, but last night I spent about 25 minutes messing around with the words and got 7240 grains of rice donated. And even a little bit can make a difference.