Free Rice

The United Nations has designed an online, vocabulary game called Free Rice that anyone can play and help feed the hungry. For every synonym matched correctly, the UN donates 10 grains of rice to its World Food Program.

Here's how it works: As you play, advertisements will appear at the bottom of the screen. The money paid for that ad will then go to buy the amount of rice you earn by playing. The Web site does not make any profit the site.

There are 50 different vocabulary levels, and according to the site, it will automatically adjust to your level after a variety of words have been drawn from in the first few questions.

I find this concept a little weird because I'm supposedly feeding hungry people by sitting on my ass in front of my computer. Nevertheless, I'll be playing. You should too.