Autism affects people of all ages, but it originates in early brain development and symptoms may present themselves in children as young as 2-3 years of age. Research has shown that root causes of autism are various and usually have to do with a combination of genetic and environmental factors. Intellectual disabilities and difficulties with motor coordination, attention, and sleep are several symptoms that may occur in children with autism. Some individuals on the autistic spectrum may also be highly proficient in visual skills, music, math, and art.