Tic Tac Toe is a super fun game played on a square with nine little boxes! You and your friend take turns putting either an X or an O in one of the boxes. The goal is to be the first to get three of your marks in a row—this can be across, up and down, or diagonally! If everyone puts their marks and no one gets three in a row, it’s a tie called a "cat's game." It’s really quick to play, and you can challenge each other again and again to see who’s the best! Ready, set, go!