This is a basic course textbook set from the Human Academy Robot Classroom. It was used by a child for about a year. The motor operation has been confirmed. Regarding the parts, one each of the three types shown on the left side of the 7th image is missing, and two of the two-dot blocks on the right side are missing. Also, the textbook has been used, so there are some places where the child has written in it. Overall, I think it's in good condition, but please consider this as a used item. #HumanAcademy #RobotClassroom #Textbook