I tutor kids in my free time from ages 4 up to college. I find that Processing/p5.js is a great tool for teaching younger kids how to use their imagination through the vessel of built-in functions + tweaking arguments to instantly see their input on the canvas in the form of bright, flashy colors/shapes. It requires a much more hands on approach and can really only be done well in 1 on 1 settings. While I wish there was a way for me to be less of a navigator in terms of the amount of code that goes on the screen, I have come to find that kids are generally exceptional at pattern recognition. Even my student that is 4 (although he’s a smart kid) is capable of writing his own scripts now without much guidance in his logic/syntax. I had my own start with micro worlds as a kid, and played with netlogo in a college class. That made me a staunch supporter of kids getting into code through agent/turtle based environments