It's a vocabulary test. For every word you get right, FreeRice donates 10 grains of rice to a hungry persons around the world. The rice is distributed by the United Nations World Food Program (WFP).
FreeRice automatically adjusts to your level of vocabulary. It starts by giving you words at different levels of difficulty and then, based on how you do, assigns you an approximate starting level. You then determine a more exact level for yourself as you play. When you get a word wrong, you go to an easier level.
There are 50 levels in all, but it is rare for people to get above level 48.
Link - via Nothing To Do With Arbroath
Check it out at http://www.aidtochildren.com
diskussed is just the kind of person that should be locked in a room to starve. sitting at your computer writing banal comments, helping no one, all with no need whatsoever of moving your butt... how cute.
If the growth continues at all on the rate it's going, it could turn into a significant amount.
Also, check the Wikipedia entry for more info. http://en.wikipedia.org/wiki/FreeRice