Background: The differential susceptibility hypothesis states that some genetic variants that confer risk in adverse environments are beneficial in normal or nurturing environments. The cholinergic system is promising as a source of susceptibility genes because of its involvement in learning and neural plasticity. The cholinergic receptor gene…

Summer camps provide opportunities for children to experience play, pleasurable activities, and social interaction with other children of similar ages and interests and are an integral part of the modern-day American cultural landscape. The authors discuss the emergence of summer camps for children with special needs, the types of play activities…