Free Rice is a charity website where you can play a vocabulary game to help fight the world hunger. According to their site, for each correct word you chose during the vocabulary play, they donate 20 grains of rice through the UN World Food Program to help end the hunger.

Although I'm not for the UN as I'm not satisfied with their actions, I like this helping via playing while educating idea of "Free Rice" (besides they have a beautiful site design :-) , so I too took part and managed to donate 1220 grains of rice! Ironically I am playing to help the so-called hungry people while my own country has suddenly gone out of its rice supplies due to the dryness resulting from the lack of rain!!