Many new technologies for children focus on fostering learning. However, designers and researchers often come from disparate traditions that either stress innovative design methodologies (e.g. participatory design) or rigorous examination of learning (e.g., design-based research). This workshop brings together researchers who are actively engaged in, or interested in, weaving together these research fields to develop usable, engaging, and innovative technologies that are also deeply grounded in theories of learning. We invite participants to submit position papers describing their work in progress. The goals of the workshop will be to better articulate the unique issues that arise at the intersection of interaction design and learning design, and develop an agenda for a next wave of research that draws a clear link between methodologies in these fields. All topic areas related to design, learning, and children are welcome.