Using a sample of 735 two-parent families drawn from the FFCWS, we examined the direct and indirect associations between fathers' permanent earnings during the early childhood and children's cognitive and behavioral outcomes at ages 5 and 9 through parental investments, family processes, and children's skills at age 3. We found that fathers' earnings in the early years were significantly related to children's language skills at age 5 but not to aggressive behavior or to any outcomes at age 9. The association between earnings and language skills at age 5 and math and reading at age 9 were mediated by cognitively stimulating materials and children's language skills at age 5. The effect sizes are small and the mediating effects of fathers' earnings on reading and math are only for children of the highest earning fathers. For two-parent families, policies to increase fathers' earnings alone will have little impact on children's development.