This paper reports an embedded educational activity named Summer School on Embedded System Technologies (SSEST) in Japan. We, the committee members made up of students and young engineers gathering from all over the country, set down beginners as main targets since they have few chance to experience a series of processes of an embedded system development. This activity aims to provide an opportunity to learn elementary knowledge and skills of embedded system technologies through a practice of whole development process. Communication skills of participants can be enhanced by an interchange among them of different universities and companies through a group work. In this paper, we introduce a learning curriculum and contents of SSEST. Our curriculum consists of prior individual training and boot camp. Participants develop a line trace car through the embedded system development process. Then, we discuss the educational effects on this activity and achievements of the purpose. According to answers of the questionnaire, the 94% of participants satisfied or almost satisfied for SSEST.