My aunt was visiting this weekend and she mentioned a site her family been on recently.
It's a great site which gives you an interesting vocabulary quiz. A few other subjects including art, chemistry, geography, and math are also available. Finally for each question you get right 10 grains of rice will be donated to people in need. Yes, you can have a bit of fun, learn something, and help people for free in your spare time.
So far I donated 850 grains of rice, my best level has been 42, though I spent most of my time in the 30's.
I also found out the Gnu means Wildebeest. I plan to use it as often as possible.