In the realm of early childhood stimulation, we evaluated the interaction between social workers and caregivers of children aged 0 to 3. Through interviews, our team investigated the quality of the visits made in terms of relevance and effectiveness. We also evaluated the perceptions of caregivers about the activities offered by the "Criança Feliz" Program, which provided orientation on early childhood stimulation and proper care to vulnerable parents. This study was sponsored by the UNDP.