Worldreader, the nonprofit organization with a mission to create a world where everyone is a reader, is proving that mobile phones can be used as tools for engaging parents in reading to their young children. Knowing the cognitive and developmental benefits of reading to children from an early age, Worldreader set out to leverage the ubiquity of mobile phones, developing a habit of reading and improving early learning at the household level. In 2015, Worldreader and a network of public and corporate partners began research to find out how mobile phones could be used to engage parents and caregivers in reading to their young children in India, at scale, launching Worldreader Kids. In 2017, as a result of the research in India, Worldreader expanded the program to Jordan in response to the refugee crisis, with the aim of providing social-emotional content and early learning supports for displaced communities. The Worldreader Kids app is available through a web browser or as a downloadable Android application. Through it, Worldreader Kids provides a growing collection of hundreds of children's books and learning resources (currently available in English, Arabic, and Hindi) to foster parental engagement in early learning. Worldreader selected partners based on their extensive networks, their ability to scale, and their knowledge of early childhood development, reading, or early education in the region. These partners were able to integrate the Worldreader Kids application into their existing programming, train parents on how to use the application, and contribute to Worldreader's behavior change campaign on the ground. The campaign was aimed at communicating the value of reading and making reading to children a habitual activity for parents and caregivers.