Educational Set of Maria Montessori (Ducool Completed Proofreaded and Translated Edition)

This book states that 0-6 years old period of time is the critical period in children's life and can affect their whole lives. More importantly, this period is irreversible. Once you have missed it, there is nothing we can do. Some certain kind of ability can show up and disappear in a certain period of time. It's most effective for training when the abilities are showing up. The educational method of Maria Montessori trains the children in several dimensions, covering most of the abilities. This book is a treasure for parents and educationist who expect to be better.