From the game box: "On The Ball is spring training and league action all rolled into one. You play and learn the fundamentals, the strategies, the situations, the rules -- just the same as in a real baseball game. The better you are at the game of On The Ball, the more you will be on-the-ball in a real game." Part trivia game, part roll and move (with a spinner), the game's purpose is to teach the rules and strategies of baseball.