Windy and her friends are at it again. In Mild and Mellow's Rainbow Bright, Windy and her friends create a beautiful chalk rainbow that gets washed away by a sudden thunderstorm. The friends don't let that ruin their fun though; they continue to play, splashing in puddles, until a real rainbow brightens their day.

The interactive storybook allows children to move the story forward by completing various activities on each page. Players may match objects to cloud shapes, tap on clouds to make it rain, or help the friends splash in puddles. If readers get stuck, each page offers helpful hints to get things moving again. Children can select three reading modes: Read to Me, Read Myself, and Autoplay; so, the app can match each child's ability and interest level. In addition to the story and its embedded activities, there are two games as well: "Sound Board," in which readers create a song with voices and sound effects from the story, and "Match Wheel," which asks children to select appropriate clothing and accessories for particular weather types. The app is a short, easily accessible story with limited interactive features that are designed to move the story forward without being distracting.