I'd like to bring your attention to FreeRice.com. You'll find a banner link to it right above this post. Free Rice is simple. You go to the website, play a vocabulary game and for every definition you match correctly, 20 grains of rice will be donated to be distributed through United Nations World Food Program.
There are no gimmicks, it's simply a humanitarian effort that combines philanthropy with education. You get to add to your vocabulary and learn new words and hungry people have more food to eat. So please, do your part in helping.
Here, from the website, are the answers to my initial questions. Yours may be answered in the FreeRice FAQ section.
Who pays for the donated rice?
The rice is paid for by the advertisers whose names you see on the bottom of your vocabulary screen. This is regular advertising for these companies, but it is also something more. Through their advertising at FreeRice, these companies support both learning (free vocabulary for everyone) and reducing hunger (free rice for the hungry). We commend these companies for their participation at FreeRice.
If FreeRice has the rice to give, why not give it all away right now?
FreeRice is not sitting on a pile of rice―you are earning it 20 grains at a time. Here is how it works. When you play the game, advertisements appear on the bottom of your screen. The money generated by these advertisements is then used to buy the rice. So by playing, you generate the money that pays for the rice donated to hungry people.
Does FreeRice make any money from this?
No, it does not. FreeRice runs the site at no profit.