I put down DS' love of US and the world maps, countries and flags for this question. He was 5 when he got really interested in geography and would spend a lot of time playing the map puzzle game on an APP and even did research to find out the flags for the countries. Then I summarized at the end that he would do the same thing when he's interested in any subject, whether it was math, drawing, magic or cooking.
I don't think it has to be academic. I would think anything that she showed interest and spent time researching or get more familiar with, that you can think of, can be used to help answer this question.
