The definition and characteristics of cartoons in the Introduction to Children's Literature were as follows: A cartoon is a work that uses simple, bright lines and images to express children's lives. It usually has the following characteristics: 1. Simple and bright lines: The lines of cartoon drawings are usually simple, bright and varied, not constrained by cumbersome details. 2. Exaggerated image: The image of a cartoon is usually exaggerated to show the innocence, liveliness, and cuteness of children. 3. Bright colors: The colors of cartoons are usually bright, lively and infectious. 4. Showing children's life: Cartoons usually show children's daily life, activities, toys, etc., full of innocence and fun. 5. Rich imagination: Cartoons usually show children's imagination and creativity, encouraging children to create independently. Cartoons are creative and imaginative works that express children's innocence, liveliness, and loveliness through simple and bright lines and images. They encourage children to create independently to enhance their imagination and creativity.