This thesis aims to explain the concept and importance of play in children's development and the role of preschool teachers in encouraging research and supporting play and activities in kindergarten. Preschool teachers should be guided by certain principles when preparing research activities. Play is considered an integral part of children's learning and development. It encourages creativity, social skills, motor skills, and cognitive development. In addition, the importance of creating a stimulating environment for play in kindergarten, which includes a stimulating surrounding for learning, is explained. Materials that should be found in each research center are also explained. The characteristics and requirements for a quality toy are described because it is a part of every game. This thesis also analyzes educational approaches and play methodologies in foreign nations, with a particular emphasis on outdoor and nature-based education. By incorporating practical examples and pertinent theoretical frameworks, this final work offers valuable insights into various strategies and methodologies that can leverage play as a tool for child development.