The aim of this project is to explore and realize differences in the process of socialization between reticent and aggressive children. The study included three children from mixed group of kindergarten „ Maslačak“ in Pakrac. We used the table to present given results over a certain period of time. Following results confirmed previous defined hypotheses. It has been found that specific characteristic and behaviors of reticent and aggressive children are inherented. Specific characteristic and behaviors are reduced and focused on improvement through daily activities and work of educators and positive environment in kindergarten. Kindergarten and positive environment have effect on development of children's communications skills, they increase the motivation to perform everyday activities. It is very important to establish communication with a child. After realized communication through game, activities, songs and dance you can affect to their intellectual development, you can make them feel accepted and valuable. During the research the most important is to be close to the children and to be like them, find the right way which leads to their heart. In that moment it is possible to use methods which positively effect on solution of problems. Social interaction between kids in the group is extremely important and it is crucial for kids development and socialization.