A child with a disability is unable to perform certain functions as well as most others. The disability may be physical, it may involve senses like seeing or hearing, it may involve the inability to think clearly, or it may involve mental health. Many people with a disability have full abilities in other areas. Disability in childhood shows a lifelong impact on a person’s physical, mental and emotional health, as well as their social situation.  Adults with a disability may have special needs, particularly regarding health and education, and may need to negotiate significant social and environmental barriers in order to fully participate in everyday life.