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If there’s a kind of puzzle not included in this incredibly varied collection, we can’t imagine what it is. There are math problems, lateral-thinking conundrums, brain teasers, whodunits, IQ tests, trivia quizzes…as well as an assortment of baffling optical illusions and amazing stunts using paper, scissors, and other items found around the house. It’s nonstop fun, but every one of these challenges will enhance real-life problem-solving skills.