The concept of the number is hard to learn. This is a little game we use in our kindergarten to work with it. We have cards with numbers from 1 to 20 and dice-cards with the normal 1 to 6 dots. Kids have to come up with different combinations of dices so that they reach the number in the lap. It’s a game that awakens many discussions between the kids: how many combinations are possible? Is it the same if we change the order?