Hi all,  at Northwestern, I've been developing agent-based models for kids to explore key science phenomena.  The most recently one, is a game where the player programs paint brushes that then drive around and paint. Then the paint diffuses across the screen like ink in water. In short, its an 'abstract painter model' Please check it out: https://anthopper.itch.io/abstract-painter

Here are some images of the output of the simulation

We usually post on the project page, http://ccl.northwestern.edu/theorybuilding/, but thought sharing it here may get new feedback on the work. We'd love to hear what you think, or ideas you have.