This study investigated the integration of loose parts into preschool arts education to enhance children's learning experiences, particularly within in-between spaces and centered around music, combining visual arts and dramatic play. Conducted as a case study in a Taiwanese private preschool, the research explored the use of loose parts in art activities inspired by the song "Joyfully Setting off Firecrackers" during the Lunar New Year festival. Over 3 months, a teacher guided seven children, collecting data through interviews, teacher journals, and analyses of children's work. The findings revealed that selecting a distinctive children's song allowed the teacher to design engaging activities that encouraged exploration of musical elements and diverse artistic expressions, thereby increasing motivation and collaboration. The curriculum involved environmental exploration, associating loose parts with musical elements, and culminated in creating listening maps and ensemble performances. By integrating visual arts and dramatic play around music, this strategy enhanced children's enthusiasm for creative expression and facilitated esthetic development. The study also highlighted the environment's crucial role in shaping engagement, with a preference for outdoor activities. This research contributes to literature by underscoring the value of integrating arts education with loose parts, enhancing children's learning experiences and fostering creative engagement.