I wrote processing sketches to generate labyrinths ( local-guru.net/blog/2011/04/23/generating-labyrinths-in-processing )

or hexagonal labyrinths ( local-guru.net/blog/2011/04/26/hexagonal-labyrinths-in-processing ) some days ago.

Then I modified my sketch a bit to generate a 3D version of the labyrinth and export it as a stl-File ( local-guru.net/blog/2011/04/29/printed-hexagonal-labyrinth )

So if you need a labyrinth for your next puzzle or your science experiment with ants or ... download the sketch, generate a labyrinth, take the stl-file and print it on your makerbot or use it in your mashups.