Magic Stylus Clean Cri For FreeProduct information: Material: cardboard material Size: 5. 1 * 7. 5 inches 13 * 19cm Color: White, light gray, dark gray, black Features: Square and three dimensional slot design, track the writing of these books. Copybooks can be written in a standardized format, and use interesting and practical children in daily life to increase their interest in magic calligraphy: these books are interesting graphic combinations, with lovely colors and shapes,