Magic Water Forest Land Magic Coloring Books consist of 4 separate colorable pages. It measures 22 x 17 cm. Various pictures appear on its special thick pages - the pages become colored as they get wet with the water filled into the magic pen - and return to their original state as they dry. Can be used over and over again. No paint etc. Does not contain substance. Only water is added to the pen. In this way, it is not possible to color anywhere other than the book while painting. The book content of our product has been prepared by the Psychology Experts Clinic and it has been approved that it helps children develop their hand-eye coordination and dexterity skills and also contributes to the development of children's selectiveness.