The paper continues the research of the process of Polish language acquisition by children. It is based on the utterances of one child that were recorded regularly by her parents. Both parents have university education In Polish and they teach Polish language in a high school and at university. The author's goal is to show the strategies and language behavior the child adopts, and the means she uses to play an effective part in their social life. The analyzed utterances viewed within a wide social context reveal the reasons of various peculiarities and fluctuations in the inflection of words and the child's neologisms as well.