It lets you test your vocabulary and every one of your correct answers will supply 10 grains of rice to the United Nations World Food Program.*
The great thing is that it is truly addictive. On my first try I achieved this...
"You have now donated 2,830 grains of rice" and reached a vocabulary level of 42.
So that's what I get for reading Agatha Christie murder mysteries when I was in elementary school, moving on to Austen, García-Márquez, Wharton, Scott, and Adams as I grew older.
Go HERE and have fun.
*This is the sister site of Poverty.com.