Entertaining kids game that gives mental addition practice. The program optionally offers addition problems with positive and negative numbers. Supports 1-2 players with multiple difficulty levels. Intuitive interface and easy TicTacToe based rules. Good addition skills are a foundation for math and will benefit a child throughout life. While your kids enjoy playing, our game will give them invaluable mental addition practice. With our 2 player option you can join in on the fun (learning :-). When you're busy your kids can challenge the computer and try to beat their high score. Multiple difficulty levels and optional negative numbers. A simple interface and easy Tic Tac Toe based rules.