With the majority of kids apps hitting the smartphone and tablet market in the form of interactive eBooks with embedded games, developers must have more than great characters and stunning art to set their products apart. In this session, we'll review the key research and design principles behind developing interactive children's eBooks. Topics covered include literacy development milestones, eBook and mobile game usability guidelines, and best practices for crafting kid-friendly narratives. The design guidelines will be illustrated using exemplary eBooks that are currently on the market.