Proof-of-Concept Study of the SNOEZELEN Device on Anxiety Symptoms in Patients Hospitalized for Chemotherapy in a Pediatric Oncology Department

This study is testing whether a sensory relaxation room called a Snoezelen — which uses gentle lights, sounds, textures, and calming environments — can help reduce anxiety in children and teenagers who are in the hospital receiving chemotherapy for cancer. The goal is to find a non-medication approach to managing treatment-related stress. **You may be eligible if...** - You are between 8 and 17 years old - You are a new patient being treated for any type of cancer at the participating hospital in France - You are staying in the hospital for several days for chemotherapy - You (and your parent or guardian) speak French and agree to participate - You have valid social security coverage **You may NOT be eligible if...** - You have claustrophobia or would feel distressed in a small enclosed room - You have psychiatric, cognitive, or addiction issues that would prevent you from following the study - You are too unwell (severe fatigue or symptoms not responding to treatment) to participate - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.