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Puzzle Master (Popularity:  )
http://www.puzzlemaster.ca/
Metal and wood puzzles for any age.
Category:
Shopping - Toys and Games - Games - Puzzles
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Mind Bluff (Popularity: )
http://mindbluff.com
A family-friendly collection of tactile illusions, mental deceptions, optical tricks, brain puzzlers, and feeling games to play on the self.
Category:
Science - Social Sciences - Psychology - Sensation and Perception
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Cambridge Physics Outlet (Popularity: )
http://www.cpo.com/
Equipment and software for inquiry-based hands-on teaching of integrated math, science, and technology. Also, there are interactive science puzzlers and an online products catalog.
Category:
Science - Physics - Instruments and Supplies - Educational
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SuDoku Pro (Popularity: )
http://www.sudoku-pro.com/
Su Doku: The highly addictive puzzle craze---now available for PC! Based on symbolic logic (no maths involved), these simple yet tricky puzzles have famously enthralled puzzlers in Japan and the UK. Now, Su Doku is getting increasingly popular all around ...
Category:
Entertainment - Games - Puzzles - Puzzle Games
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Crossword Star (Popularity: )
http://www.crosswordstar.com/
Digital solving aid and dictionary available for purchase.
Category:
Entertainment - Games - Puzzles - Crosswords - Solving Tools
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