This document provides an overview of an Essential Package for addressing the needs of young vulnerable children affected by HIV/AIDS. It discusses: 1) What early childhood care and development (ECD) entails and why the earliest years are most critical for development. 2) The components of the Essential Package framework, which provides age-appropriate support for children aged 0-8 and their caregivers. 3) Research conducted in Malawi and Zambia to evaluate implementation of the package and identify best practices, challenges, and recommendations to strengthen and scale up the program.