This project will utilize community health workers (CHWs) and conditional cash transfers (CCTs) to evaluate the mechanisms of action, feasibility and acceptability of implementing an intervention package to promote child growth and development through supply and demand-sided delivery platforms, and will explore the effectiveness of the two implementation models on child growth and child development. This project will include a field trial in rural Tanzania with 3 arms: with CHWs only; CHWs and CCTs; and a control arm.