Types: Children's exercise bookSuitable age: 3-8 years oldName: Magical Children's BookSize: 130mm*190mmenglish languageMaterial: white cardboardPackage includes: 4pcs book + giftGift: 1 pen box + 5 refills + pen holding aidWe used magic writing pens. After writing for a period of time, the font will disappear and return to its original shape, which can be used again and again.