Carrying on the success of Malezi, Malezi II will continue to support children aged 0 to 5 years around high-volume maternal and child health clinics and HIV care and treatment centers in three districts of Tabora. Malezi II will improve the capacity of health staff in responding to the developmental needs of young children. This project will launch an innovative media/communications component to enrich caregiver engagement in child stimulation. This project will introduce a bidirectional referral system, which will include mapping of existing relevant support services and assist children with developmental delays through linkages to those services. Malezi II includes a major operations research component assessing the efficacy of messaging across multiple media platforms.