The study is a repeated-measures cross-over pilot RCT to examine the feasibility of the trial protocol for a study into the effectiveness of immersive VR in minimizing procedural pain and distress in children with cancer. The research objectives are to: (1) pilot implementing immersive virtual reality (VR) for effectiveness testing in a future RCT (measured as implementation outcomes); (2) determine treatment effect sizes (measured as preliminary effectiveness outcomes), between VR, programmed to distract children during an SCP needle insertion, and an active control intervention (i.e., watching a video with headphones); and (3) assess impact of child and parent factors potentially associated with VR treatment effectiveness. Both the intervention and control groups will receive standard medical care (e.g., topical anesthetics). A convenience sample of 40 children and adolescents with cancer (20 participants per treatment arm; 10 boys and 10 girls per treatment arm) will be recruited. In addition, each child will act as their own control. A washout period of 1 month will be used to control for any carry-over effect between conditions. In addition to usual care, children in the experimental condition will wear the VR headset plus headphones. In the control condition, children will watch a video (i.e., an age-appropriate video selected by an oncology-affiliated child life specialist) on an iPad, while wearing the same headphones as in the experimental condition. Implementation outcomes include accrual and retention rates, acceptability and technical difficulties. Effectiveness outcomes include child pain, distress, and fear, as well as parent distress.