Khan Academy recently released a JavaScript + Processing.js integrated development environment for teaching kids to program. It's a lot of fun. Here are a bunch of very simple demos I've written in the past week or so. Explore the limit sets of the Mandelbrot iteration http://www.khanacademy.org/cs/mandelbrot-spirals/1026049545 (without the map) http://www.khanacademy.org/cs/mandelbrot-spirals-2/1030775610 (with the map) A fractal tree that grows and changes shape http://www.khanacademy.org/cs/tree/1029209629 Playing with color and shape http://www.khanacademy.org/cs/traces/1029027232 http://www.khanacademy.org/cs/traces-2/1029086864 Doubling-angle spirals with turtle graphics http://www.khanacademy.org/cs/spirals/1023512142 -- Mike Stay - metaweta@gmail.com http://www.cs.auckland.ac.nz/~mike http://reperiendi.wordpress.com