The purpose of our study is to develop computer educational materials for elementary or junior high-school students and to let them have interests in a computer and programming. Theyare able to learn the basics of computer and programing for micro robots football. A GUI for block type programming was developed so that the students can program easily. Experiments are done for 14 junior high students. Questionnaire result shows that 13 students of them had interests in the programming or the robots.