Explanation
1) All children acquire at least one linguistic system. Similarity of the process across languages and across people.2) Daily immersion in verbal bath, no special practice and testing. 3) Child = active participant in figuring out underlying set of organizational principles and sound meaning relationships. 4) Short period = more or less five years. 5) Language acquisition involves high-level abstracting, relating, integrating that happens before the child can apply those skills to processes other than the acquisition of the language.