DescriptionOur coloring book is made of premium paper featuring clear printing and smooth texture. Each page has its own pattern design, and each illustration comes withcorresponding instruction for coloring. This comprehensive collection of developmental book is designed to help kids to exercise their various abilities.Feature- Color: Assorted.- Material: Paper.- Size: About. 19 x 16 x 0.5cm/ 7.48 x 6.3 x 0.2 inch. - Reusable coloring book, more fun and enjoyable. - No coloring book. The invisible ink pen reveals hidden games and pictures. - This comprehensive collection of developmental book is designed to help kids to exercise their various abilities. - Learning while painting, it is an natural and effective way for kids to learn about the things. - A wonderful way to stimulate important key skills, like language, reading skills, communication skills, imagination. - Good parent-children interactive plaything.