This thesis systematically and concisely explains fundamental principles of conflict, types of conflict and ways of teaching children about constructive, nonviolent resolution of such. Research begins by defining basic principles of communication and emphasizing importance of the sole ability to communicate. From the earliest age people are daily involved in communication with others. This is the foundation for development of any other social skill. Social competence is being developed during growing up, it begins in the family home and it continues through social interaction with other people. It is essential to develop social interaction skills and it is also important to encourage development of these skills in children, because social skills enable us to achieve all our desires and needs through communication. Social skills that should be specially encouraged in children are skills of listening, cooperation, empathy towards others and self respect. . Children must learn how to react to conflict and this will greatly influence the quality of their personal life as well as their life within the community. Theoretical knowledge on communication, on growing social skills and on learning how to constructively resolve conflicts is accompanied with practical findings and through workshops on constructive conflict resolution among children of preschool age.