Congratulations! You got a talented kid. It didn't mean the method would work if a kid was not ready, though. I did exactly the same thing to other 7-year olds, using pizza, using cereal, using number lines, and using shapes. None worked.
ETA: On the other hand, I'm not sure how I feel about that framing. I hated it as a kid when I asked about something and an adult wouldn't even try to explain it to me, or point me in the right direction to learn, and just say I wasn't ready to learn that yet.