There’s a group over on Flickr called Mini Kaleids – Krazydad Style that collects images produced with one of my kaleidoscope toys (found on this very website).
The pool is up to 700 images, so I thought now would be a good time to build a Coverpop mosaic of all that eye candy. Here it is. [...]

On December 18th, 1987, the first version of the Perl programming language was released. You can learn more about it in this article over at Wired.

A lot of the visitors to this website assume my tool of choice is Flash, because that is one of the most visible things here, but in truth, a [...]

Here are some new puzzles I’m working on.
These twelve Slitherlink puzzles use the aperiodic five-fold tiling discovered by Sir Roger Penrose. Not only are the puzzles pretty, but the tiling creates a variety of intersections, which makes the puzzles more interesting.
Download ‘em here…
Thanks to Craig Kaplan for providing the dataset for the tiles!

I’ve been enjoying Slitherlink puzzles lately, and thinking about publishing some variations. Below is a Slitherlink puzzle on a Hexagonal grid I made recently. This tiling makes it more complex in some ways, and easier in others.
More importantly, from my point of view, it’s round. Always a good thing in [...]