We evaluate the impact of the Bono Solidario, a transfer payment scheme in Ecuador, on children's nutritional status. In addition to testing for pure income effects, because the programme transferred money to mothers of young children, we test whether mother's income has a stronger effect on children's heights and weights than ordinary household income. We draw two main conclusions: that the Bono Solidario transfer payment scheme has had a statistically significant but quite modest impact on children's nutritional status, and that this impact is no different than any other income effect on height and weight. In particular, the fact that the Bono is transferred to mothers has not made it more efficacious at reducing malnutrition than other household income.