If you have a couple of minutes to kill time, I recommend checking out www.freerice.com.
This website tests your knowledge by asking you to guess the meaning of words. For every one you get rice, 20 grains of rice through the United Nations. The rice is paid for by the sponsors on each page (at the bottom of the page, so it doesn’t get annoyingly in the way).
This is a great way to help those less fortunate while improving your own smarts.
If you have one minute, and get six right, you just helped donate 120 grains of rice so others in the world can eat.
It’s a great idea, and it doesn’t take much effort from you to help out.