The purpose of this paper is to quantitatively clarify the educational effect of LEGO practice by comparing the questionnaire results of LEGO training and other manufacturing practice. By comparing with satisfaction, aggressiveness, and applied skill in the questionnaire results from the students, we show numerically that the evaluation of the LEGO practice is extremely good. Especially, LEGO practice proves effective for introduction education in lower grades. In addition, from the application example to PBL education in the higher grades and extracurricular activity, it is found that LEGO Mindstorms is suitable as a theme of the group work, because it becomes easy to collaborate with each other without depending on the compatibility and the individual ability between the students.