This paper uses several decades of U.S. time-diary surveys to assess the impact of low-skilled immigration, through lower prices for commercial childcare, on parental time investments. Using an instrumental variables approach that accounts for the endogenous location of immigrants, we find that low-skilled immigration to the United States has contributed to substantial reductions in the time allocated to basic childcare by college-educated mothers of nonschoolaged children. However, these mothers have not reduced the time allocated to more stimulating educational and recreational activities with their children. Understanding the factors driving parental-time investments on children is crucial from a child-development perspective.