The Frontiers in Digital Child Safety initiative seeks to contribute to ongoing debates about novel ways to advance child safety through a series of open-source materials, including research briefs, issue spotters, or technical descriptions. It is complementary to existing and emerging child protection efforts. The transatlantic multi-stakeholder initiative at the TUM Think Tank is made possible by financial support from Apple. It invites collaboration among scholars at TUM, Harvard University, and the University of Zurich, and facilitates contributions by a global research community. The initiative will explore a range of innovative technological, educational, and other approaches to prevent and respond to digital child safety issues.