One of my first Processing projects was a series of connect the dots style animations, like this:
As the project grew I also made printable designs. I used these designs for the covers of my holiday cards and the back of my personal cards.
To facilitate the work positioning the dots, I built an Inkscape extension in Python. It extracts path information from a SVG file and creates the correct input file for my Processing program. Using this tool, I can make new designs in an hour or two.
The animations can be found on Vimeo.
And the pdf files. Fun for the whole family!