"Water Magic Colouring is a set of four books on "Princess", "Dinosaur", "Farm Animal and "Unicorn". Each book of this set can come to colourful when painted with a special pen given with them. This pen can be easily used by just adding water. When the water dries, the colours disappear and the book pages can be painted again and again. Lovely kids are sure to enjoy these colouring books for a long time.