This partially randomized pilot trial studies peer mentoring to see how well it works in promoting follow-up care self-management in younger childhood cancer survivors. Childhood cancer survivors require lifelong follow-up care to identify, monitor, and treat medical and psychosocial late effects stemming from their cancer, its treatment, and lifestyle factors. A peer mentoring program may improve disease knowledge, health motivation, problem-solving skills, stress management, and communication with caregivers and providers in adolescent and young adult cancer survivors.