- Optical Illusions 4 Kids
This is a kid safe zone with optical illusions for kids of all ages. Challenge your skills of perception. Is what you see, what you get? Will you ever be able to trust an eye witness account again? Remember seeing is not always believing.
- A Fun Zone
If you've got some time on your hands, A Fun Zone is sure to entertain! There is plenty to do, so don't let the boss catch you!
- Aha! Puzzles
Original creative puzzles with 'aha!' answers by Lloyd King, author of 'Puzzles For The High IQ'.
- PlayWithYourMind
Play Mind Games
- Aboard Puzzle Depot
Trivia, Puzzles and Games For Education or Recreation!
- TodaysChuckle
Daily Jokes and Brain Teasers.
- Kids IQ Test Center
Intelligence tests for kids and teenagers.
- A1 Puzzles and Crosswords
Interactive Crosswords and Puzzles.
- Conceptis – logic puzzles
Free logic puzzles, online or with pencil and paper, and related activities: logic puzzle forums, stories and articles, news and reviews, and even logic puzzle humour and lifestyles.
- The Contest Center
Win big cash prizes in their challenging fun-filled puzzle contests. 8 new puzzle contests added monthly.
- Puzzle Express
Free monthly puzzles to download, online wordsearch and crossword, puzzle playing software and solitaire games. Programs for Windows 95 and Windows CE.
- Brain teasers by Barry R. Clarke
You will find liar problems, logic teasers, number conundrums, matchstick puzzles, lateral mind-benders, in fact, there's something for everyone!
- curiouser.co.uk
Home of the Paradoxical. Features a selection of paradoxical puzzles, tricks, illusions, games, poems, quotations and more. 9 out of 10 respondents say curiouser.co.uk is the curiousest.
- Logic Games
Challenging Logic Strategy Games for Windows and Macintosh.
- Puzzle Connection
Crossword, Word Search and Word Game Puzzle Site featuring weekly puzzles and puzzle software.
- Core Concepts
High quality logic and puzzle games with a touch of adventure. Free Daily Puzzles.
- Dave the Worm
How laterally can you think?
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- Worksheet Library
Worksheet Library is home to over 5,000 printable K-6 worksheets for teachers, parents, and homeschoolers.
- Hitori Solver
Nice Java applet for solving Hitori puzzles.
- Kid Cartoonists
Featuring cartoons from kids all over the world, and home of Slylock Fox cartoon puzzles.
- Archimedes Lab
Mental and puzzling activities designed to stimulate and enhance critical and creative thinking skills.
- Cut-The-Knot
Interactive Mathematics Miscellany and Puzzles: An encyclopedic collection of articles, solved K12 math problems, computer games and math magic, mathematical fallacies and illusions.
- Puzzles of Leonid Mochalov
Take a look at the puzzles of Leonid Mochalov, an interesting Russian puzzle inventor.
- TriviaSpot
New trivia questions every day! Compete against others around the world for prizes.
- Eyetricks
Optical illusions, 3D stereograms, brain games and other mind teasing oddities.
- Puzzle Monster
Home to monster trivia, mazes, logic puzzles and word puzzles!
- Mind Breakers
The Mind Breakers - puzzles, riddles, brainteasers and card tricks.
- Fundrum My Conundrum
100 math puzzles, riddles and logic puzzles arranged in order of difficulty.
- International High IQ Society
This prestigious international society offers free professional IQ tests, challenging puzzles and brainteasers, and premium chess, backgammon, bridge, and Go tournaments.
- Ten Problems
Exploration, Calculation, Observation: Brain Teasers and Puzzles.
- Only Riddles
1,000 of only the best riddles.
- Brain Teasers
Amusing and prominent world brainteasers are collected on this site, including riddles, geometry, algebra puzzles, puzzles with matches, paradoxes and optical illusions.
- Pzzls
A collection of logic puzzles, riddles and brain teasers.
- BrainJuice!
Have you had your dose of food colouring and preservative free mental stimulation today?
- The Puzzle & Craft Factory
High quality Mechanical Puzzles, Games and Educational Toys.
- IQ Challenge Cup
An online IQ puzzles contest, where the most intelligent are recognised.
- The Enigmatic World Of Philip Carter
A collection of mind-blowing brain teasers, quiz questions and psychometric tests, all designed to stretch your wits to the limit and beyond, from this prolific author of puzzle books, IQ Tests and trivia quizzes.
- Livewire Puzzles
Livewire Puzzles has been making and selling wire disentanglement puzzles since 1979. The puzzles are of various levels of difficulty and appeal to puzzle lovers from ages 9 to 99.
- The Great Enigma Challenge
Ponder over amusing and entertaining characters and situations as you use all your logical, analytical and lateral thinking skills to solve the many diverse problems laid out.
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