Tic Tac 15 is a children's math game. It operates in two player mode or in one player against the Palm device. The object of the game is to make 3 numbers in a row add to 15 horizontally, vertically, or diagonally. The players take turns revealing the next random number from the numbers 1 to 9 and placing it on a 3x3 grid. The game keeps cumulative scores of wins losses and ties. At any time, the player can have the Palm device display or hide the running totals in each of the directions. When someone wins, the winning three squares in a row are indicated. The game is freeware.