You should check out this site.
The premise is that for every question you answer correctly, they will donate 20 grains of rice to the UN World Food Program. That's it. All you have to do is answer mulitple choice questions and they will give rice to starving people. Even the laziest of the lazy and those that the economy are treating rather harshly right now can help others in need. Awesome!
The website defaults to the category of English Vocabulary but you can change that to fit your mood and/or desire. The categories are: Famous Paintings, Chemical Symbols (Basic), Chemical Symbols (Full List), English Grammar, English Vocabulary, Identify Countries on the Map, World Capitals, French, German, Italian, Spanish, Basic Math (Pre-Algebra), and Multiplication Table.
There is a rice bowl on the right hand side of the screen that will keep track of how many grains of rice you are donating, but it resets everytime you leave the site so you have to keep track of it on your own if you want a running total every time you go back.
So far, I have donated 6130 grains of rice by
I repeat...what could be better than that?