MESS FREE: Never worry about kids make creative space mess and dirty due to no paint included. Just fill the magic pen with water and draw on the water drawing reveal book. It is great toy for travel play. VIVID SCENE: Create arts from now on. Colorful ocean scene makes kids love drawing and learn more knowledge about sea when playing. Manufacturered by Yileqi. EDUCATIONAL TOY: Great sensory toy for children and helps to develop kids skills such as fine motor skills hand-eye coordination color recognition reading & writing imagination and focus attention. GREAT GIFT IDEA: Unique technology and non-toxic of water reveal fun books for kids to enjoy drawing and painting. 6x7.5inch size is suitable for kids perfect for toddlers age 3 4 5 6. REUSABLE PAINTING KIT: Books display vibrant color when wet and naturally disappear after 5-10 minutes later dry kids can draw and play again. Yileqi reusable water drawing book are not a single-use item it provides endless hours of coloring and creating fun.