Features: Broad Knowledge Coverage: This children's encyclopedia covers various fields such as nature, technology, and daily life, satisfying kids' curiosity. Illustrated Content Design: Featuring high-quality pictures that help explain abstract concepts for better understanding. Easy To Read Language: Written in simple language suitable for elementary school students to read independently. Eco-friendly Printing: Printed with soybean ink that is safe for eyes and odorless, ensuring a pleasant reading experience. Durable Hardcover Binding: The hardcover design makes the books long-lasting and perfect for collection. Specifications: Material: Paper Size: 21cm*14.5cm per book Weight: Not specified Includes: Full set of Children's Encyclopedia books Include: 1 * Full Set of Children's Encyclopedia Books