At such an age, like a boy and girls, with a great understanding, they relate to the emergence of a new family member and even try to help with the end of their strength. When the younger sister or brother is growing up, joint games begin, but quarrels and even fights are also quite real, because the older brother needs to draw a drawing in a kindergarten or school, and the sister relying this drawing tore. Then again it is worth explaining to the older child that the younger simply does not yet understand and makes such dirty tricks not from evil. The baby also deserves censure, but with an explanation of why it is not worth doing this.