The Social Security and Supplemental Security Income disability programs are the largest of several Federal programs that provide assistance to people with disabilities. A child can receive SSI if he or she has a physical or mental condition, or combination of conditions before the age of 22, that meets Social Security’s definition of disability for children, and if his or her income and resources fall within the eligibility limits. An adult who becomes a person with a disability is eligible if he or she can not work because of a disability.