These are just a few of the many changes that are taking place between birth and linguistic maturity in terms of language learning, processing, and production. During this time, kids learn how to identify the raw materials in their language's sounds (or gestures), how to put them together into longer strings, and how to map these combinations onto meaning.
It seems like magic.
The multilingual polyglots learn six, seven, or twenty languages.
While others can learn only one or two, they master them at an uncommonly high level of proficiency, with a native accent and local slang.
Edunative curriculums take into account the psychological characteristics of children of different ages. At the trial lesson the teacher determines the level of knowledge of the child, taking into account his/her age and knowledge.