The socio-emotional development of children begins with birth and parental attachment to the child. This connection allows the mother to respond to the child’s needs in a timely manner. During the first year of life, children develop basic trust, do not have the ability to make their own decisions, but are dependent on parents or guardians. Creating and developing basic trust during the first year of life allows an infant to seek out a parent or guardian in times of stressful events thus creating a sense of attachment. Even before learning and learning a language, babies in the first year of life learn to communicate through emotions. It can be argued that learning emotional regulation and impulse control can determine later success in life more than IQ. There is a rapid growth of social and emotional areas of the brain during the first two years of life. The child then processes and interprets stimuli from the environment that produce an emotional response. Based on this, children build emotional and stressful regulatory systems of the body. During the second half of childhood (3-5), emotional information becomes part of children’s consciousness. Attachment and attachment is considered a key event in a person’s emotional development. It lays the foundation for a child's safety, cultivates self-esteem and builds emotional regulation and self-control skills. The emergence of a global pandemic caused by the COVID-19 virus as an external stimulus has greatly affected the emotional development of children in different periods of growth. The results of the research undeniably imply that the global pandemic significantly affects the socio-emotional development of children and adolescents, especially in less developed countries.