Web-Based Physical Activity Intervention in Improving Long Term Health in Children and Adolescents With Cancer

Inclusion Criteria: * All cancer cases with an International Classification of Diseases for Oncology (ICD)-O histologic behavior code of two "2" (carcinoma in situ) or three "3" (malignant), in remission * Patient must have completed curative therapy (surgery and/or radiation and/or chemotherapy) within the past 12 months at a Childrens Oncology Group (COG) institution * Patients must have a performance status corresponding to Eastern Cooperative Oncology Group (ECOG) scores of 0, 1, or 2; use Lansky for patients =\< 16 years of age * At the time of consent, patient or parent/guardian reports less than 420 minutes of moderate to vigorous physical activity over the last week * Patient and at least one parent/guardian are able to read and write English, Spanish, and/or French; at least 1 parent/guardian must be able to read and write English, Spanish, and/or French in order to assist the patient with using their physical activity tracking device account * All patients and/or their parents or legal guardians must sign a written informed consent * All institutional, Food and Drug Administration (FDA), and National Cancer Institute (NCI) requirements for human studies must be met Exclusion Criteria: * Patients with previous hematopoietic stem cell transplant (HSCT) * Patients with significant concurrent disease, illness, psychiatric disorder or social issue that would compromise patient safety or compliance with protocol therapy, or interfere with consent, study participation, …