AskOxford: Word Games - [ Teens/Mature Teens ] - Cryptic and easy crosswords, fiendish word games, the history of crosswords, and scrabble and behind the scenes at Countdown.
eLibs.com - [ Kids/Teens ] - Creating interactive stories from user inputs. Possibility to add a dialect; also different categories and polls.
Jim Kalb's Palindrome Connection - [ Teens/Mature Teens ] - A collection of links to web pages about palindromes -- phrases that spell the same forwards as backwards, like "Able was I ere I saw Elba".
Lost in Translation - [ Teens/Mature Teens ] - Enter a sentence to have it translated from English to five different languages and back. The result is often funny; nothing like the original sentence.
Mockok.com - [ Teens/Mature Teens ] - A large collection of palindromes, focusing on palindromic single sentences (spelling the same forwards and backwards). Submissions welcome.
The Nautical Origins for Some Common Expressions - [ Teens/Mature Teens ] - Explaining the seafaring origins of some common words, figures of speech, and everyday expressions, like "toe the line" and "scuttlebutt".
NOVA: Decoding Nazi Secrets - [ Teens/Mature Teens ] - Crack the ciphers, send a coded message, and find out what goes on in the minds of code-breakers.
Phobias - [ Teens/Mature Teens ] - Article that lists some of the more amusing phobias, like arachibutyrophobia -- the fear of peanut butter sticking to the roof of the mouth.
Piece of Pi MadLibs - [ Teens/Mature Teens ] - Featuring a collection of madlib stories and poetry.