“The International Children’s Digital Library was initially created by an interdisciplinary research team at the University of Maryland in cooperation with the Internet Archive. Members of the team include computer scientists, librarians, educational technologists, classroom teachers, graphic designers, and graduate students from the University of Maryland’s (UMD) College of Information Studies (CLIS) and the UMD Human-Computer Interaction Lab (HCIL), a leader in children’s interface design.”

Their search interface is particularly cool - it’s very kid-friendly with big, obvious buttons that allow users to search for books by age range, length, subject and most importantly, cover colour! You can also search using combinations of the above. (Thanks to Linda B. for the tip!)