Tic-tac-toe, noughts and crosses, or Xs and Os is a two-player paper-and-pencil game in which players alternately mark the squares in a three-by-three grid with an X or an O.
Why has tic-tac-toe been around for almost 3,000 years if it is as simple as it appears? This popular game helps youngsters develop in a variety of ways, including predictability, problem-solving, spatial thinking, hand-eye coordination, turn-taking, and strategizing.
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