This manual provides guidance on how to assess needs, design and implement Early Childhood Development in Emergencies (ECDiE). It covers four components: early learning and stimulating environments, positive child-caregiver interaction, protective environments, and holistic child wellbeing. Section one explains these four components, including guidance on what to consider when designing ECDiE programmes and how to best support early learning. Section two incorporates the core components of ECDiE into the program design cycle, focusing on the assessment, program design and implementation. Links to further guidance and resources are given at the end of the document.