Must-have calligraphy training book for children with disappearing ink for repeated practice. Fluted writing practice book with three-dimensional groove design and standardized writing format. Thick, strong, stain-resistant, and durable calligraphy paper texture. Silicone pen holder for a comfortable and effective writing experience. Reusable workbook includes addition, subtraction, numbers, alphabet, pen, pencil holder, and refills. Suitable for home, school, office, and more. Description: Introducing the pen control training book, a must-have book for children to learn calligraphy. This innovative calligraphy exercise book features disappearing ink that vanishes after 10 minutes, allowing for repeated practice. The fluted writing practice book is not only practical but also economical for parents. It is an ideal gift for children of all ages. The pen control training book is designed with a three-dimensional groove and standardized writing format, ensuring proper pen control and letter formation. The calligraphy paper texture is thick, strong, stain-resistant, and durable, making it perfect for long-lasting use. The pen holder is made of silicone, providing a comfortable and effective writing experience for children. This reusable fluted handwriting workbook includes various sections such as addition and subtraction, numbers, fun pictures, and the alphabet. It comes with a pen, a kids handwriting pencil holder, and 10 refills. With this comprehensive set, children can practice their writing skills while having fun. The pen control training book helps create connections between learning and play. It is designed to engage preschoolers in practicing their reading and writing skills in an enjoyable way. Whether at home, in the study room, school, classroom, office, or dormitory, this versatile product is suitable for various environments. Item Name: Copybook Material: White Cardboard Suitable Ink: Weak Solvent Style: Modern Style Features: Disappearing Ink, Reusable, Grooved Size Details: Length And Width of Copybook: 18.8cm x 13cm/7.4" x 5.1" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 4 x Copybooks 10 x Refills 1 x Pen 1 x Pen Holder (Random Color)