noun
children's book
A book written for children, typically including picture books, early readers, and juvenile literature.
図書館の児童書コーナーで絵本を借りた。
I borrowed a picture book from the children's book section of the library.
この作家は多くの児童書を書いている。
This author has written many children's books.
童話 refers to fairy tales or children's stories, often traditional or fantastical, while 児童書 is a broader term for any book aimed at children.
Compound of 児童 (child) and 書 (book).