Editor's Note: Google "brain games for kids" and you can find apps, board games, puzzles, phonic fun, improvisational games-the list goes on and on for all ages in a billion dollar market. But questions remain: do toys and games improve thinking or IQ, or do they just make a child better at playing the games? Our authors examine the market and give us an inside look at some of the research behind this billion-dollar industry.
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