POWER UP: Participating Online While Exercising to Recover Using Play

Inclusion Criteria: In order to be eligible to participate in Aim 1 of this study, an individual must meet all of the following criteria: Round 1 focus groups: 1. Oncologists who are caring for AYA cancer survivors or 2. Survivorship care providers who actively engage with AYA cancer survivors Round 2 focus groups: 1. AYA cancer survivors age 15-39 years old 2. Self-reported diagnosis of a primary benign or malignant CNS tumor or confirmed diagnosis of primary benign or malignant CNS tumor radiographically or pathologically when available 3. ≤1-year post surgery and can have other tumor-directed treatment (e.g., radiation and/or chemotherapy) 4. Participants and/or guardians are willing and able to provide informed consent 5. Able to speak, read, and understand English 6. Daily access to the web 7. Can receive physical therapy because this is part of the standard of care In order to be eligible to participate in Aim 2 of this study, an individual must meet all of the following criteria: 1. Age 15-39 years old 2. Self-reported diagnosis of a primary benign or malignant CNS tumor or confirmed diagnosis of primary benign or malignant CNS tumor radiographically or pathologically when available 3. ≤1-year post surgery and can have other tumor-directed treatment (e.g., radiation and/or chemotherapy) 4. Participant is insufficiently active (reports less than 150 minutes of planned moderate-vigorous intensity activity per week in the prior week) 5. Able to speak, read, and understand English 6. Daily access to the web 7. Approval to participate from the oncology care team 8. Participants and/or guardians are willing and able to provide informed consent 9. Able to move arms and legs as well as ambulate safely with and without a gait aid 10. Available space on the smartphone to download required apps 11. Can receive physical therapy because this is part of the standard of care 12. Participants and/or guardians are willing and able to provide informed consent for protocol PA18-0130 (Pediatric Energy Balance Data Repository Study), companion protocol for the Fitbit application/assessment. Exclusion Criteria An individual who meets any of the following criteria will be excluded from participation in Aim 1 of this study: Round 1 Focus Groups: 1\. Do not have access to the internet Round 2 Focus Groups: 1. Another member of the household is a participant or staff member on this trial 2. Do not have access to the internet 3. In foster care or is incarcerated 4. Cognitive and/or major sensory deficits that would impede the completion of research activities and assessments as deemed by the clinical team. 5. Self-reported diagnosis of a metastatic CNS tumor or confirmed diagnosis of a metastatic CNS tumor radiographically or pathologically when available An individual who meets any of the following criteria will be excluded from participation in Aim 2 of this study: 1. Currently pregnant 2. Currently have dementia 3. Plans to travel for more than 2 weeks at a time during the study period where the participant is not able to sign in to join the videoconferencing sessions 4. Clinical judgment by the oncology care team concerning safety based on the Physical Activity Readiness Questionnaire for Everyone (2020 PAR-Q+) 5. Cognitive and/or major sensory deficits that would impede the completion of research activities and assessments as deemed by the clinical team. 6. Self-reported diagnosis of a metastatic CNS tumor or confirmed diagnosis of a metastatic CNS tumor radiographically or pathologically when available 7. Currently participating in an organized commercial or research-based exercise program 8. Another member of the household is a participant or staff member on this trial