Features: - These books are colorful page, can attract kids eye, helpful for your kids to train painting. - The water book is the perfect size to slip into your child's hand luggage and accompany them on every trip. - Each book has 8 pages of cartoon content, including 4 interesting and vivid animal designs and 4 hidden magical drawing papers. - Which do not show color when dry, and can reveal the pattern secrets when wet. - Best toddler toys for 3+ year old kids. You can express your love for your kids with this colorful and interesting water drawing book. - Water drawing book is perfect for children to stimulate their interest and curiosity, not just limited to ink, and mothers no longer have to worry about their baby soiling their clothes and carpets. Specification: Material: Paper with special coating, Plastic pens Size: 19 x 15 cm / 7.5 x 3.15 Inches Style: Cosmic theme, Underwater world, Dinosaur world, Robot Package include: 4 x Water Colouring Books 4 x Refillable Water Pen Instructions: 1. Unscrew the tip of the pen clockwise in the "on" direction. 2. Inject clean water. 3. Squeeze the tip of the pen in the "Off" direction. 4. Start painting. Warm tips: 1. Just add water to our matching pen and you can shake the pen up and down properly, so that the water will wet the pen tip more quickly, which is convenient for you to scribble on our magical drawing book. 2. After the graffiti is finished, please wait for 2-3minutes for the coating to air dry before using it again. (You could use a fan to speed up its drying)