If you do it is important that your child is able to not only distinguish colors, but also with great success came to that. that would be as good as possible, and carefully check all that he can and can you just need to work out a little bit with him. And the notion of the matter is that it should be done in the game. As soon as you teach him to think correctly, and correctly make a decision, then you can be assured that it will not be lost.