Feelio is a fun and engaging mobile app that helps children aged 4–9 recognize, understand, and express their emotions through mood check-ins, breathing exercises, storytelling, and creative activities. This UI/UX case study highlights the complete design journey—from user research and personas to empathy mapping, information architecture, and a playful visual system built around a lovable elephant mascot—delivering an intuitive, kid-friendly experience that makes emotional learning joyful, interactive, and meaningful.