Piaget's theory

At the beginning of the class the teacher gaves us a sheets about Piaget, we started to know about piagets theory, we talked about it and then compare it with our own experience, and about diferent kinds of teaching methods. And answering to the first question printed in the sheets the children learn a mother language, because they are thinking about the meanings of the enviromental situations of them about the people the children grow with all the society and the need of communicate himself, the second question I would say it's when the children has stablish their mother language at eight or ten years they may learn another language but it could be also because a need or situations he have to face in a future.