Brainteasers
Brain Boosters http://school.discoveryeducation.com/brainboosters/
Brain Food -challenging logic puzzle http://www.rinkworks.com/brainfood/
Braingle- games, brain teasers, puzzles and more http://braingle.com/
Brain Quest- Take the Brain Quest challenge http://www.brainquest.com/kids
Puzzle Parlor- Interactive games and puzzles http://www.gamepuzzles.com/pparlor/puzzleparlmm.html
Puzzle Playground- A treasury of classic and modern puzzles http://www.puzzles.com/PuzzlePlayground/WelcomeToPuzzlePlayground.htm
Mystery Master Logic Puzzles http://www.mysterymaster.com/puzzles.html
Scholastic Games and Puzzles http://www.scholastic.com/kids/stacks/games/
Conceptis Logic Puzzles http://www.conceptispuzzles.com/
Towers of Hanoi- An interactive version of the ancient logic puzzle http://illuminations.nctm.org/ActivityDetail.aspx?ID=40
Sharp Brains- Top 50 brain teasers http://www.sharpbrains.com/teasers/
Puzzlemaker by Discovery Education- Create your own puzzles http://www.discoveryeducation.com/free-puzzlemaker/?CFID=13729171&CFTOKEN=69868598
The Grey Labrynth- Can you solve the unsolved puzzles? http://www.greylabyrinth.com/puzzles
Puzzle Soup- Daily puzzles, wordles and more! http://www.puzzlesoup.com/
Riddles and Brainteasers by National Institute of Environmental Health Sciences http://kids.niehs.nih.gov/games/riddles/index.htm
Visual Puns http://rwmarketing.com/News/VisPun.html