The optimal period which can be significantly influencing the establishment of young children's cognitive, social, emotional and psychological learning activities, and positive attitudes and appreciation of participation in regular health-related physical activities has been recognized as Early Childhood (3-8 year-olds). Since movement is the very center of young children's lives, it is the primary vehicle to assist children's total learning. Most nurseries / child care centers and some kindergartens in Hong Kong, movement, physical plays, physical activities under the umbrella of preschool physical education (P.E.) have been arranged in daily time-table of the "Whole Child Curriculum". Recent research studies have strongly indicated that the development of preschool physical education curriculum has been hindered due to some major factors namely: the internal (inside the preschool), external (outside the preschool), and human (child care workers & parents etc.) factors. The ultimate purpose of the study is to collect concrete field data at a nursery in Hong Kong by a case study method with the employment of participation observation (one month), class observation (6 P.E. lessons) and interviews (6 interviewees, 15-20 minutes for each) about the problems / difficulties encountered by the child care workers (CCWs) in the development of preschool physical education curriculum in the preschool in order to investigate: what the problems are; what the causes of the problems encountered are; what the influences are; and what the remedies/solutions are. According to the results of the class observations (6 CCWs & 6 P.E. lessons, with a duration of 30 minutes per lesson) CCWs have encountered major problems in the following areas: teaching approach & stages; teaching skills in observation; demonstration and arrangement of group work; safety and health measures. All these areas are related to the professional practical knowledge and skills. The results of the interviews have