Food packaging can establish an "entertainment-knowledge-action" interactive closed-loop mechanism for children, effectively guiding them to practice healthy behaviors, overcoming the low efficiency of conventional text-and-image-based instruction, and continuously strengthening their health awareness. At present, interactive design for cultivating children's health awareness through food packaging is constrained by superficial forms of interaction, insufficient integration of entertainment functions, fragmented system construction, and the absence of educational mechanisms in the implementation stage. The "entertainment-knowledge-action" closed-loop design can specifically address the limitations of traditional packaging, including fragmented interaction, superficial cognition, and weak behavioral guidance. Specifically, entertainment serves as the entry point by reversing children's resistance to health education through engaging interactions; knowledge, embedded in entertaining scenarios, facilitates the internalization and construction of children's health cognition by incorporating scientific dietary knowledge; and action promotes the transformation of static cognition into practical healthy eating behaviors through scenario-based interactive tasks and quantitative guidance.