Each of the 17 screens (pages) of this 17 ebook features a color and an emotion. As you swipe through the pages, you tap to remove one color, and replace it with another to see the mood of the page change. The illustrations, music and narration are very well done. The interactive features are limited, but work. You learn that colors can make you feel different emotions like happy, sad or angry. The idea is that imagination can change the world from bad to good.⁠ Books tend to load slowly. Written by Iranian author Ehsan Abdollahi with beautiful illustrations by Ahmadreza Ahmadi. The story is by Based on the printed book by Tiny Owl Publishing.