Achieving the child-related Sustainable Development Goals (SDGs) hinges on unlocking dramatically increased investments over the next decade. Attention is now focused on a diverse source of investments and new instruments that can blend these together effectively. Yet practice lags behind with few financial innovations so far succeeding in delivering impact at scale for children. Which innovative finance mechanisms offer the most promise for children, including for development and humanitarian needs? How can the case for child-related investments be strengthened? What tools or policies can assist families in funding their children’s nutrition, health and education? We examine frontier opportunities and approaches to financing child investments around the world, and how the constraints to better financing can be lifted.