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For years, people have made the mistake in believing they can keep their mind sharp by merely doing crossword puzzles (although recently, Sudoku seems to have taken its place). True cognitive fitness, however, stems from immersing your mind in a wide variety of challenges and puzzle types. Here at www.smart-kit.com, you have the chance to stimulate and exercise not just one- but many areas of your brain with a great collection of puzzles and brain teasers, brain games, trivia quizzes, and jigsaw puzzles.

lay Educational Games, Solve Problems & Puzzles! At The Problem Site, you can play educational games and daily puzzles, find interesting reference pages, and engage in fun problem solving activities. There are word games, math games, math problems, mystery quests, and many other free educational resources.