This paper estimates the labor market effects of gaining eligibility for Supplemental Security Income (SSI) disability benefits during childhood. In theory, access to SSI could help children treat their disabilities, thus improving labor market outcomes in the long run. Alternatively, children who are designated as disabled may reduce their investment in human capital, which would harm future labor market outcomes. I identify the effects of qualifying for SSI benefits through a natural experiment-a Supreme Court decision eased the criteria to be considered disabled, especially for children with mental disorders. The policy change also occurred earlier in some people's lives than others. For individuals with a mental disorder, each additional year of exposure to eased standards during childhood increased their SSI receipt by 0.3 years and reduced cumulative labor market earnings through age 30 by $1,600. Importantly, this does not address the full range of outcomes that may be affected by receiving benefits. The author is grateful to Prashant Bharadwaj, Julie Cullen, Gordon Dahl, and Craig McIntosh for being so generous with their time and for many helpful discussions. I am extremely thankful to Jeffrey Hemmeter and John Jones at the Social Security Administration, who helped run programs and set me up with data access at SSA, and without whom this paper would not have been possible.