The pre-school period is "golden ageperiod", meaning a golden period for all aspects of human development, both physical, emotional and social cognition between the ages of three and six years, development is focused on becoming social people, learning to get along with other people. While social interaction. This study aims to determine the relationship of parental care patterns, motivation and use of Youtube to the development of children's social interactions in the Lenteng Agung dolphin turtle in 2018. This research is an analytical survey with a cross sectional approach. This research was conducted in August-December 2018. Respondents in this study were 48 children at the Lenteng Agung Dolphin Dolphin Kindergarten using the Total Sampling technique. Retrieving data using questionnaires, then processed and analyzed univariate and bivariate. Data is presented in the form of narratives and tables. The results of the study of parenting variables on the development of social interactions obtained p-value (0.016) with OR = 5.3 For the motivational variables on the development of social interactions p-value (0.032) with OR = 4.5 for the use of youtube variables for development social interaction obtained p-value 0.001 with OR = 10.4. The most related to the development of social interaction of children in TK Dolphin is the use of youtube. It is recommended for kindergarten dolphins to improve the development of social interaction in children and as an evaluation of children's education that parents' parenting factors, motivation and use of youtube can relate to the development of social interaction.