20 Questions

 http://www.20q.net/

This intriguing site has the user choose an "answer," and then the computer asks 20 questions trying to determine what your answer is. The answers to the 20 questions aren't just YES or NO; they also include SOMETIMES, PROBABLY, IRRELEVANT, and others.

When you arrive at the site, click your language (there are MANY languages to choose from). Enter your gender, age, and location (optional). Then choose the "game" you wish to try. Some are more commercial (Disney, The Simpsons, or Star Trek). Others have educational value (Harry Potter, Earth, or Classic, Famous people). This is a fun and challenging activity. There are disclaimers that the "game gets smarter" the more you play because the game compiles facts over time. It is involving and fun to play. The site does include some advertisements.