Today, the child is seen as an active creator of knowledge and researcher, a complete being that is competent and has its own specific needs and rights. The child is competent to make decisions and express his own opinion. Special emphasis is placed on the co-construction of the child's knowledge and environment, i.e. the child's participation in decisions concerning his upbringing and education. An unavoidable part of a child's learning is precisely his environment in which he resides. The term environment implies the spatial and material environment and the outdoor space of the kindergarten. The space in which the child stays is extremely important for him because it is permeated with various learning situations and it is necessary that it is organized in a challenging, stimulating way and that allows him to explore the world around him. For children's growth and development, spending time outdoors is extremely important, therefore it is necessary that it is suitable for children, stimulating and that children participate in its co-construction. The topic of children's participation in the creation of outdoor space was researched in the Kindergarten "Grdelin" in Buzet, and the results are presented in this thesis.