A very simple game whereby you have to roll the dice and then flip numbers 1-9 to correspond to the total shown on the dice. If you flip all the numbers down, you "shut the box" and you win. Such a simple concept, and yet somehow, once you start, you can't stop. If it's taking you ages to shut the box, you will probably sit there and play continuously until you manage it- I know I did. This is a game that you can play with any number of people- you can even play it by yourself. The game itself is well built and of good quality. This will even sharpen your mental arithmetic skills!