The purpose of this research was to compare the development of early childhood before and after using the experiential project approach by the experiential project approach. The study was carried out by the experimental research to compare the development of early childhood before and after using the experiential project approach. The representative samples included 14 kindergarten students of Bannonsamore School under Kamphaeng Phet Educational Service Area Office 1 in the academic year of 2010. The research method was one group pretest-posttest design. The research instruments were the 2 plans of the experimental project approach and 4 papers of early childhood development observation for 4 aspects of children development. The dependent t-test was used to analyze the data.