During a parent-teacher conference, Mrs. Thompson, a kinderg…

During a parent-teacher conference, Mrs. Thompson, a kindergarten teacher, discusses her students’ milestones in development with their parents. She points out that the majority of the children in her class are beginning to take part in symbolic play and learning to see things from other people’s perspectives. According to Piaget’s stages of cognitive development, which developmental stage are Mrs. Thompson’s students most likely in?