In the questionnaire free writing space for both the lecture and system, 24 students wrote what they liked. Most of them made positive comments expressing their excited feelings gained from the system, for example, "I was really surprised, because the system was extraordinarily exciting and more robust than I expected.", "I think that it must be more interesting if we can feel the intermolecular force between bigger molecules.", "I guess that I could better understand the contents of the lecture by actually feeling the force.", "I grasped the meaning of the potential and force function chart more deeply by actually feeling the changes of the force.", "I would like to buy the system for myself.", and "This system is exciting! I am interested in the development of this system in future, too." Some of the students seemed to be interested in the mechanism of the haptic device.