Brazil’s Programa Crianca Feliz (Happy Child Program) was one of the winners of the WISE Awards in 2019. It has been described as the world’s biggest ECD experiment, aiming to prove that teaching poor parents how to love and nurture their infants will dramatically influence the kind of adults they become. The program uses the WHO/UNICEF Care for Child Development package. Since October 2016 home visitors have reached nearly 500,000 children, and the plan is to reach two million by 2023. more. There is a short video introducing the program here and a more detailed discussion here.