Tic-tac-toe (American English), nougats and crosses (British English), or Xs and Os is a paper-and-pencil game for two players, X and O, who take turns marking the spaces in a 3×3 grid. The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row is the winner.

This classic game contributes to children’s developmental growth in numerous ways including their understanding of predictability, problem solving, spatial reasoning, hand-eye coordination, turn taking, and strategizing. Free to play, priceless to learn.