In this thesis, the design considerations of a healthy and stimulating bedroom environment for preschool period children are analyzed. In order to build up a multipurpose environment, the development of the preschool children, necessary items of furniture and the related design concepts are discussed. General design criteria are determined to constitute a guide for a children bedroom environment of preschool period. Under the light of these data, a research is conducted to analyze today&rsquo / s children furniture market in Turkey.