Online Arts Trivia

Check out FreeRice.com. Its a website with trivia quizzes devoted to different school subjects. Apparently, for every correct answer they donate 20 grains of rice to the UN World Food Program. They periodically add new subjects and just came out with an arts section. Right now they only have a famous paintings quiz in the arts section but is really fun and kind of tough. I've only made it to level 6 so far. So check it out, but I'm warning you - its addictive! 
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Ashley