Typically, age 3 is regarded as the best age to start preschool. Some health and delayed development issues may delay the start of preschool, but many early education programs accommodate special-needs children.
WebMD states that preschool offers children many benefits, helping them learn to socialize, cooperate and share and providing them with a head start on reading and math. By age 3, a child typically has the mindset to engage in the group learning and play environment of preschool.
A child should be on a solid immunization schedule and be healthy enough to attend school regularly. Developmental delays, whether intellectual or emotional, can be aided by specialized preschool, where children may form friendships that carry over into kindergarten and the educational years beyond. Decisions about a child's preschool education can be made in conjunction with the school itself and the child's pediatrician.