"Why? How Come? Science Stories for Second Graders" Mitsuharu Oyama / Rie Watanabe / Nobuyuki Irizawa / Nozomi Kai Price: ¥800 "Why? How Come? Everyday Mysteries for Second Graders" Yumiko Tanda / Michiyo Hayano / Nobuyuki Irizawa Price: ¥800 No cover, has yellowing These items have been used by children, so they have some scratches and stains. Please refrain from purchasing if you are looking for perfection or are overly concerned about condition. Please understand that these are used items stored at home before purchasing. Packaging will be done using recycled materials (used paper bags, etc.).