The purpose of this study was to describe language acquisition in children aged 3-4 years. The subjects of this study were 3 boys from PAUD Pitara Pondok Cabe Ilir, Pamulang, South Tangerang aged about 3-4 years. The focus of this research is the acquisition at the level of fontology to syntax. Data was collected by using documentation, interview, listening, and note-taking techniques. This study applies a qualitative descriptive method. The results showed that language acquisition in children aged 3-5 years occurred in the fields of phonology, syntax, and semantics. In terms of phonology, subjects E, A, and R have mastered most of the consonant phonemes. However, there are also some phonemes that cannot be pronounced perfectly. In terms of morphology, subjects E, A, and R have mastered the form of words that are obtained or mastered are monomorphemic word forms (one morpheme) and language acquisition in the syntactic aspect, indicating that there is a phenomenon of the production of simple sentences or called minor sentences.