This is a children's picture book series with a science theme, designed to cultivate children's curiosity. - Title: Kagaku no Tomo (Friends of Science) - Series Name: Kagaku no Tomo (Friends of Science) - Number of Books: 23 - Target Age: Preschoolers - Content: Picture books with a science theme - Language: Japanese - Illustrations: Colorful and attractive illustrations - Publisher: Fukuinkan Shoten The total cost exceeds 10,000 yen, as each book is 440 yen. The sender's name will be removed before shipping. These books were read by my son, and the month written on the cover has been marked over with a marker. Please check the photos. Some books are missing, and one book my older daughter was reading has been added. I couldn't find one other book ( ; ; )