In the past, children were able to reach a very high level. This is because their comprehensive research always kept them busy, finding things that would make their work easier not only technology, but also all science and medicine. Because we know that there were many state wars in the past and they suffered, and they spent their lives doing such research so that they would not suffer. And it can be added that in the past children did not has careers a simple example of this is walking home from school it is much better than taking some children by car.