• Braingle
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• Cool Quiz! Trivia, Quizzes, Puzzles, Jokes, Useless Knowledge, FUN!
  
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• Mind Bluff
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  A family-friendly collection of optical illusions, brain teasers, fun riddles, tactile tricks, mental games, and unusual self-deceptions.
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• Mind Bluff
  optical illusions, free games, puzzles, brain teasers, riddles, mental tricks, and more!
  A family-friendly collection of optical illusions, brain teasers, fun riddles, tactile tricks, mental games, and unusual self-deceptions.
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  in COOL SITES with brain free games illusions optical puzzles sites teasers by 5 users
• playwithyourmind.com
  play free online word games, typing games, logic puzzles and other mind games
  Mind games galore - online word games, typing tests, logic puzzles and more. 100% original!
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• PUZZLES. Can you believe it?
  
  Mind and Visual Puzzles and Activities that enhance critical, logical,and creative thinking skills, and keep your brain active!
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