You perfectly know that the most valuable contribution to the life of man is his children. That and trying to give them all that is possible, a lot of time with them doing. But what all of this they are not bothered trying to dilute the game, but the game choose only logical. After all, if your child will be able to quickly and accurately solve such a problem, then your time has passed and it is, and why are you still made it in this life. Samples.