In "Extremely Loud and Incredibly Close," the protagonist uses a tambourine as a symbol of his identity while navigating the varied neighborhoods he encounters. This simple act of shaking the tambourine serves as a reminder that despite external changes and challenges, his core self remains intact. The tambourine becomes a personal anchor in a world full of uncertainty.

Through this metaphor, Jonathan Safran Foer illustrates the importance of maintaining one's sense of self amidst chaos. The character's journey emphasizes the emotional struggle of holding onto identity in the face of loss and change, highlighting how small gestures can provide comfort and continuity throughout life's transitions.