The thesis investigates the educators key part in the holistic growth and progress of the child. Focusing on the physical, cognitive and socioemotional aspects of development, it analyzes how educators provide support and guidance for each of these developmental areas. Educators should enable children to adopt and perfect the expected behaviors in an appropriat eway and at the right time. Given that the educator is often the first person outside the family circle who takes care of the child, the way in which he communicates with the child and the way in which he builds trust and creates conditions for social learning is important. This thesis presents the overall development of a preschool child and the educator's influence on each individual aspect. Furthermore, the role of play in children's development is explained, as well as the educator's contribution to the child's play itself. In the context of physical development, educators provide a physically safe and stimulating environment in which children can move, explore and develop motor skills. Through structured physical activities and play, they encourage the healthy development of the child's body. Educators have a key role in encouraging the cognitive development of a child. They encourage the growth of the child's imagination, problem solving and the development of language skills. Through a variety of activities and games, educators create a stimulating environment that encourages cognitive development. Socio-emotional development is no less important, and educatorsplay a key role in the development of emotional intelligence, social skills and self-confidence in children. By providing emotional support, teaching children how to recognize and express their feelings, and encouraging positive interpersonal relationships, educators shape children's ability to successfully cope with the challenges of everyday life. The importance of play in children's development was also investigated and it was found that play is not only a means of entertainment, but also a powerful learning tool. Educators encourage play as a way of learning and developing skills and provide structure and support to use play to encourage all aspects of development. The educator's contribution is deeply integrated into all aspects of the child's development and leaves a lasting impact on the child's ability to become a competent, self-aware and empathetic member of society, and it is impossible to overestimate the importanc eof the educator's role in shaping future generations.