Feynman Technique Explainer

Explain [complex concept] as if teaching it to a curious 12-year-old with no background knowledge. Use: (1) A single concrete everyday analogy as the foundation. (2) Build up from first principles — no jargon without immediate definition. (3) One "aha moment" — the counterintuitive thing that makes it click. (4) A simple mental model they can carry. (5) Check understanding: 3 questions they could answer if they got it. (6) Where this concept shows up in real life.