The paper is thick, not easy to smudge and not easy to stain. The pen holder is made of silicone, which is 100% safe for children. Book Size : 18.9 * 13 CM & 4 BOOK + 5 REFILL+ 1 Pen +1 Grip. Building basic skills helps your little ones learn their letters, numbers and pictures on every page. It is a great tool for developing fine motor skills and eye-hand coordination. [COMFORTABLE WRITING DESIGN]: Practice copybook 19*13 cm, it has a three-dimensional groove design, high-quality paper, strong and durable. The cute soft pen holder allows you to hold the pen for a long time, always comfortable. [BUILD WRITING SKILLS]: During writing, kids will use the pen to follow paths and draw different shapes. Calligraphy set for beginners can help children practice Beautiful Handwriting. [SOLEMNLY PROMISE]: If you have any questions about our calligraphy set, Please feel free to contact us. We will give you a satisfactory reply within 24 hours.