This article, an interview with the two authors of a new book, is interesting. But a lot of us, besides being parents (as I am), are fully grown adults wondering how to develop our minds. An eminent researcher on human intelligence, James R. Flynn, wrote a book on that topic called How To Improve Your Mind: 20 Keys to Unlock the Modern World[1] that is well worth reading. Many people, whatever their level of IQ, can become better thinkers by developing better "mindware" (approaches to thinking about problems), as quite a few books about human intelligence by experienced researchers have noted.

[1] https://www.amazon.com/How-Improve-Your-Mind-Unlock-ebook/dp...