He also wrote a book wich you can buy for 0$ if you want https://natureofcode.com/

or read it online for free https://natureofcode.com/book/

He's working on version 2.0 of the Nature Of Code which is more P5.js based than "processing" based (processing is p5's faster, platform native, but non web based sibling.).

I've used p5.js to make my nieces animated birthday notes.

There is a video series on the 2.0 (p5.js):

https://thecodingtrain.com/tracks/the-nature-of-code-2

github repo for version 2 of the books site (which doesn't appear to be live yet..) https://github.com/nature-of-code/book-website-2nd-edition

Dan Shiffman is pretty great at explaining and introducing things. Coding Train videos get kinda advanced, which is slightly at odds with the "kid" like graphics.

The processing foundation is the umbrella group for p5.js, processing and some other tools (android and python based).

https://processing.org/

> processing is p5's faster, platform native, but non web based sibling.

Platform independent might be clearer. It’s Java.

lamentably to late to edit..

The Java part of it is pretty well obfuscated/hidden, its much easier to install and get running than java for the most part.