The Development and Evaluation of iCF-PWR for Healthy Siblings of Individuals With Cystic Fibrosis

The goal of the clinical trial is to test whether a mental health program that is delivered through the Internet works well for healthy children and adolescents with siblings with cystic fibrosis (CF). The main questions it aims to answer are: * Does the program improve the mental health and quality of life of healthy siblings? * Does the program improve the relationship between healthy children and adolescents and their sibling with CF? * Does the program help healthy siblings learn about CF? Participants will: * Fill out an online survey asking questions about their family and mental health before the program * Complete the online mental health program over five weeks * Fill out a weekly question asking about their mood for 10 weeks * Fill out an online survey asking questions about their family and mental health after the program Healthy children and adolescents with siblings with CF will be compared against themselves. Researchers will compare participants scores before starting the program with their scores during and after completing the program. Researchers hope to develop a program that improves mental health, quality of life, sibling relationships, and knowledge about CF.