To play, think of something...anything...then answer a series of 20 questions. See if you can stump 20Q. If it quesses within 20 questions it wins. If not, you win. 20Q captures the essence of the popular 20Q.net website in a portable game.
It somehow guessed "chess board" when that's excatly what I was thinking, but had trouble with "apple". Either way, it feels great to stump this little guy, even if it is a computer.

Unit is about 2-1/2 inches in diameter. Colors vary.

Batttery included.