You fill the included pen with water and use it to moisten the white pages of the book, revealing beautiful colorful images. The search game is particularly exciting; you first uncover a small preview scene at the bottom of the book and then look for it in the large upper section. This way, children explore a new world image by image, training their cognitive skills and imagination. With this water painting book, children learn about marine life while coloring and also learn words, numbers, and counting. Contents: 1 water painting book, 1 water painting pen, instructions.