Abstract-The present study was triggered by a variety of aspects in language education which need our urgent attention. One of these aspects is language acquisition that is related to the developmental stages of children. The early age child phase is a critical period for the development of children. This study aims to determine: (1) Significant effects before and after the stimulus to language vocabulary acquisition early childhood; (2) Knowing the development of child language acquisition at age four when viewed from the aspect of vocabulary acquisition, and (3) Knowing whether the respondent is still to generalize the meaning of objects that have the same characteristics. The theory underlying the research is based on B.F. Skinner's theory of behaviorism.