TwoPaira'Dice, a multiplication game with dice and a laminated product grid

TwoPaira'Dice is a game I invented using two dice of one color and two other dice of a different color.  You will also need a laminated product/answer grid of the times tables from 4, 2x2, to 144, 12x12.  The game is played between two players and they use different colored dry/erase markers.  To see who goes first, both players roll all four dice and add them up.  The player with the highest roll goes first.  On a turn, a player rolls all four dice.  Then they add the sums of the alike colored dice and multiply to these sums to find a product.  If you were using two purple dice and two yellow dice and the roll was 3 and 1 for the purple dice and 4 and 5 for the yellow dice the answer would be thirty six.  Even though the math problem was 4x9, the player could mark their 36 on the 6x6 square on the answer grid if they preferred.  The players take turns and the player to get four in a row, either vertically, horizontally, or diagonally first wins the game.  Most numbers appear more than once on the grid except some of the perfect squares.  If a player rolls a 7x7 and later rolls that same answer he/she has to forfeit his turn and pass the dice.  TwoPaira'Dice is a great game to play as a teacher's aid with gifted students or students who need extra reinforcement of the times tables until they are memorized.