This study will use data on the Chilean poor, and will revolve around a new government program designed to improve parental skills. First, even though the average Chilean is no longer poor, this is a country with very high inequality, with roughly 2.5% of the population still living under $2 a day. Second, precisely because Chile has developed, it has unique in-country capacity (both in government and academia) to conduct such a difficult study, which involves collection and analysis of very rich household data on home environments and home investments, and rich assessments of child cognitive, non-cognitive and health development. Third, the government has expanded the delivery of early childhood services in the country and expressed desire to evaluate some of them. Particularly interesting to us is a new parenting program whose goal is to affect parenting skills of the poor, with special focus on health, cognitive stimulation, and socio-emotional development of children. The program, which is due to start, has low capacity which will lead to the creation of waiting list of parents. As a result, some families will receive it much earlier than others. The selection of early and late starters will be done through a lottery which will allow a rigorous evaluation of the program, and in consequence, a rigorous and transparent study of how parental investments can be changed, and how they affect developmental outcomes of poor children.