The Brainteasers Network - Offers a never ending supply of brainteasers, puzzles and games that challenge the mind. BrainVista - Collection of solved and unsolved brain teasers. ButlerWeb - A page of about 30 brain teasers. Answers are hidden in drop down screens. A Game A Day - A puzzle site featuring a new puzzle format each weekday for each month.
Puzzles are fun, educational, entertaining and are also printable.