To provide comprehensive information about the play that is an important part of the lives of children.

The power of play (life-long play, play in the 21st century, play as a "right", positive effects of play on child development (in terms of physical development, social and emotional development, mental development, language development, school success and literacy) the power of play in terms of the development of their skills), the acquisitions that the game provides to the child according to the types of play (physical game, game with objects, symbolic game, social game, game with rules), researches on game perception (parents 'perception of play, teachers' perception of play, perception), development and types of game (social game development (according to Erikson, Bandura, Parten), development of cognitive game (game according to Helanko, Berlyne, Piaget, Vygotsky, Smilannsky, Moore), Game types (physical game, structure -building games, dramatic play, play with natural materials, games with rules), digital games and their effects, playground, materials and toys (indoor and outdoor playgrounds, parks, playgrounds and child development, baby and Play environments and materials for toddlers, play environments and materials for preschool children, playgrounds and materials of school children, the importance of toys and their contribution to development, types of toys, effects of toys and materials on play), observing children during play (purpose and importance of play observation , game observation planning (aim of observation, determining the person to be observed, place and time to be observed), game observation methods and applications (game checklist, time sampling, event sampling, target child observation, follow-up map, anecdote recording, continuous recording, visual and audio recordings), strengths and limitations of game observation, analysis and evaluation of game observations, examples of game observations.