I did teach my son Racket at age 8, as his first programming language. He was able to make a number guessing game in it. I think we used "Realm of Racket," but

I did teach my son Racket at age 8, as his first programming language. He was able to make a number guessing game in it. I think we used "Realm of Racket," but I don't recall, as it was some years ago. He's now midway through high school and not a single course at his STEM middle school or high school has come close to teaching him as much as he learned at age 8.