If you're interested in giving bowls of rice to the poor at no cost to you please check out this link. Not only are you helping the poor but you are also learning definitions of words. Each time you guess the correct definition of the word, you are giving grains of rice. I love it and have been going there about a year now. Try it and you'll get hooked too, here is the link:
http://www.freerice.com/index.php
http://www.freerice.com/index.php
