?magic grooved writing practice Set ?: Designed specifically for tracing books for kids ages 3-5, handwriting practice for kids 5-7, this set includes 1 letter book, 1 picture book, 1 addition and subtraction book, 1 number book 1-100, 2 pens, 2 pen holders, and 11 pen refills. ? Reusable Function ?: The matching pen core uses magic ink, which will automatically disappear within 30 minutes after writing, turning the page into a fresh canvas. Do not use any ballpoint pen, but use the matching pen core or other specialized ink pen cores to allow your child to continue enjoying the fun of writing. ? Rich Content ?: Bright colors and cute shapes can stimulate children's curiosity and self motivation, encourage them to explore letters, numbers, mathematics, and painting with joy and enthusiasm, and improve their understanding of letters and numbers. ? Early Education Learning Tool ?: Provides a soft silicone grip pen trainer to ensure that children master the perfect grip method and lines as early as possible, guiding them to write and correcting incorrect grip posture and writing methods. It is a good tool for cultivating children's patience and hand eye coordination skills. ? Perfect Gift ?: In addition to being effective learning tools for kindergarten and preschool teachers, they are also suitable as gifts for children on various holidays such as Children's Day, birthdays, Christmas, and New Year. We offer 1-5 Days Free shipping 30-Days Free returns