I enjoy the various websites where you click a button and a sponsor makes a donation to a needy cause. I seem to have contributed to several over the years.
Free rice is the latest incarnation. It's a bit addictive because it is set up as a word quiz. Every time you get a word right, a sponsor donates to the UN World Food Program.
Give it a go, and add your bit. How far can you get in the quiz? I got to level 43, but there were a few guesses in there.
Great for trivia fans too.