Children who are well nurtured, appropriately cared for, and provided with positive learning opportunities in their early years have a better chance of becoming healthy and productive citizens of nations and of the world. This article reviews the art and science of policy planning for early childhood development (ECD) from a diplomacy perspective. Since ECD is often addressed as a part of the education sector and education is always a part of multisectoral ECD services, a strong relationship exists between Education Diplomacy and Early Childhood Diplomacy.