Free Rice

[your castles are falling]

I'm pretty sure everyone knows about FreeRice.com, but I think just to make sure, I should put a post.

Basically they give you a word and you guess the definition correctly they will donate 20 grains of rice to a third world country. And it's free.  

[pinkcatminht]

i love Free Rice. Facebook has an app called "Donate Rice" which is basically a Free Rice ripoff with easier words.