Mastery of 4-5 Years Old Children Vocabulary in Role-playing Activities at the Role Play Center

Children learns language through a pleasant learning experience in kindergarten. This study aims to describe the vocabulary mastery of children aged 4-5 years in role-playing activities in the Role Play Center. This type of research is descriptive qualitative. The study was conducted at Tiara Chandra Kindergarten located in Bantul Regency, Yogyakarta for 2 weeks. The instrument used to collect data is observation and documentation sheets. Observation of vocabulary mastery is observed through oral language skills that appear when the child starts a conversation and responds in each role-playing activity in the Center of Playing Role, the ability to initiate conversation and the ability to respond in conversation reveals that role-playing activities create many opportunities to develop vocabulary mastery through oral language skills in children aged 4-5 years at the Role Play Center rather than in the regular class or other centers. Keywords— children, play center, bantul regency.