Although the incidence of nightmares peaks during the preschool years, older children continue to experience occasional nightmares, as well as the fear and anxiety that can accompany a nightmare. (howtoadult.com)
But older kids (and even adults) have occasional nightmares, too. (kidshealth.org)
If your 8 - year - old responds to your reassurance following an occasional nightmare, there is usually no cause for alarm. (howtoadult.com)