In recent years, picture books with colorful illustrations and easy-to-understand text have gained interest across various fields. This chapter explores the potential of picture books as language teaching materials in early English as a foreign language (EFL) classrooms, as early English education has become increasingly important in the era of globalization. Integrating picture books into English education for young learners serves as an effective and dynamic approach not only for language acquisition—such as vocabulary and grammar skills—but also for enhancing motivation to learn. This chapter first reviews previous studies on the use of picture books in early English education, both in international contexts and in Japan. It then presents two case studies on reading aloud activities using English picture books for children aged 3 to 12. Additionally, it introduces recommended big books (large-format picture books) based on the activities conducted by the author, along with key considerations that educators should be aware of when incorporating picture books into early English language education.