Challenge 4th Grade Exciting Discovery BOOK A magazine offering fun learning for children April-December 2020 issues, February-March 2021 issues - Features: ・The Evolution of Faces ・A Deep Dive into the Mechanism of Laughter ・The Secret of Yokai's Birth ・Future Amazing Food Revolution ・Explore the Power Hidden in the Body ・Great Clothing Discovery ・Sports Made Easier with Science ・The History Hidden in Prefectural Names ・A Thorough Look at the Mystery of Taste ・Comparing Japanese Castles and World Castles ・World Why-Why Investigation This is a used item, but it is almost unused and has been stored at home. Attachments such as the Challenge main body are not included. Also, each issue is a one-shot, so there is a difference in the number of issues, but I think it can be used without any problems.