This is a set of picture books that explain questions about science and nature. These were given to me as a gift, and I haven't read them much. There are no major scratches or stains, but there may be some minor imperfections. Since these books have been read by a child, please understand and consider purchasing them. - Title: Why? How? 1st Grade - Title: Why? How? 2nd Grade Retail Price: 800 yen each + tax Thank you for looking.