Tic Tac Toe is a simple two-player game played on a 3×3 grid. Players take turns placing their marks (usually X’s and O’s) in empty squares. The first player to get three of their marks in a row (horizontally, vertically, or diagonally) wins the game. If all 9 squares are filled and neither player has three in a row, the game is a tie.

Tic Tac Toe is a solved game, which means that there is a guaranteed way for both players to play perfectly and end in a tie. However, the game is still a lot of fun to play, and it can be a good way to teach children about basic strategy and game theory.