This project was designed for people who always sit in front of a desk and are inactively facing a computer for long periods of time. This project included concepts of tangible user interface, ergonomics design, and interactive systems. The technology for this project combined Arduino, infrared sensors, audio playback, as well as LED lamps to provide a platform to users to help them exercise and at the same time acquire basic musical knowledge. When you put your hands in front of any single infrared sensor, it will trigger its corresponding audio playback and LED lamp, by means of which users can experience an overall process, such as using your upper limbs to play the piano. Through this process, users can stretch their upper limbs as well as enjoy melodies that they can play by themselves………