Funny and Stupid Ideas: Google image search quiz
Look at the pictures that appear and guess the search term used.
"This whizzy non-Flash quiz is a bit on the addictive side. It raids Google's image search, shows you the images, and in that equally addictive Jeopardy! way makes you guess the question. Sometimes one-word answers, sometimes two words, it'll have you wasting away the morning. Nifty."
-- St. Petersburg Times