There is limited understanding of how parents’ allocation of investments across their children are affected by differences in their children's participation in programs that promote early development. I use data from the National Longitudinal Survey of Youth to examine whether parents reinforce or compensate for differences in their children's access to an early education program, Head Start. I use a family fixed effects approach to contrast measures of parental investment, when children were age 5 through 14, for children who attended Head Start relative to their siblings who did not attend preschool. I find that parents provided lower levels of cognitive stimulation and emotional support to children who attended Head Start relative to their siblings who did not attend preschool. Although impacts are relatively small in magnitude (0.05 SD), results suggest that parent compensate for differences in access to early childhood educational opportunities. (author abstract)