MUSICIAN draws inspiration from the concept that "music is flowing architecture," encouraging children to create their own music as effortlessly as building blocks. We have transformed the abstract principles of music composition into a more intuitive block-building activity, creating a playground of sounds and paving a simpler path for beginners to learn and compose music. "MUSICIAN" consists of a creative device and a set of recognizable blocks, with musical blocks representing different instruments that can be freely assembled, much like mixing colorful paints on a palette! "MUSICIAN" provides real-time feedback through intuitive, natural, and heuristic musical interactions, making it an ideal platform for children's music engineering education.