These items were used by a child. The "Uchu no Fushigi Maru Mie Zukan" (Mysteries of Space Picture Book) and the "Karada no Fushigi Maru Mie Zukan" (Mysteries of the Body Picture Book) have been used. The "Utatte! Kotaete! Nippon Chizu Zukan" (Sing! Answer! Japan Map Picture Book) is unused, and the audio function has been confirmed to be working. (There is a small tear on the corner of the book.) Please check the photos for details. I believe these are educational materials from 2020-2021. These items have been stored at home, so please consider purchasing if you understand this. I am also selling other Challenge educational materials.