I began by studying the physical ritual of blowing out a candle and identifying how to translate that gesture into a digital interaction. I prototyped the input using an ESP32 and experimented with both flex sensor and microphone detection to capture airflow or bending as an activation signal. In Blender, I created a custom flame shader and particle poof animation, testing timing and responsiveness to make the interaction feel magical and immediate. Through iterative calibration and animation refinement, the final prototype became a lightweight, joyful experience that simulates the warm emotion of a birthday wish.