Children are increasingly interacting with mobile devices from an early age, offering both challenges and opportunities for health education. Studies show that children aged 6–10 spend substantial time on these technologies, which can lead to poor postural habits and motor development issues associated with sedentary behavior. This study introduces PediaMouv, a mobile app designed to promote postural education and motor skills development for children aged 6–10. The app aims to leverage children’s affinity for technology, fostering healthier habits and behaviors through interactive, engaging content. PediaMouv was developed using a human-centered design approach by a multidisciplinary team of physiotherapists, educators, and developers. It integrates scientifically validated content with an intuitive interface, including posture correction guides, exercise libraries, and ergonomic advice. PediaMouv represents an innovative approach to integrating digital tools into pediatric health education. The pilot study will evaluate the app’s usability, engagement, and preliminary impact, laying the groundwork for broader implementation.