Once your kids get hooked on this classic strategy game, you'll want to have dice, paper, and a pen with you any time you leave the house.
To start, a player writes the numbers 1 through 9 on a sheet of paper and rolls the dice. He then crosses out one or more numbers that add up to the roll. For example, if he rolls an 8, he can cross out the 8, or the 6 and the 2, the 7 and the 1, or the 5 and the 3.
After the numbers 6 and up are crossed off, the player can choose to roll just one die. If the player manages to cross off all of the numbers, he's "shut the box." If he can't match a roll to the remaining numbers, his turn ends, and any uncrossed numbers are added to his score (the lower the score, the better!).
The next player then plays with a fresh set of numbers. Players alternate rounds until one player's score reaches 50. The other player is the winner.