Magical Handwriting Workbooks Handwriting Practice Copybook, Handwriting Aid, 5 Give your children or your friend kids a funny and meaningful gift! ?4 In 1 Copybook Set?:Inclued English letter,Addition and Subtraction,Interesting Drawing,Number 1-100. ?Magic Ink?:The matching refill uses magic ink, it can automatically fade in 30 minutes after writing, so the copybook can be used repeatedly. ?Excellent Size?:The size of the copybook is 10.27.2 inches,it is more convenient for children to practice. ?Easy to Practice?:The copybooks have three-dimensional grooves template design,which is convenient for kids to master writing. ?Correct the Method of Holding Pen?:Each book has a detailed description of how to hold the pen, and a silicone handwriting aid is provided to facilitate children to master the method of holding pen.