Turtle path printer is a cool application for printing turtle paths in a tangible three-dimensional form. It's a project conducted at the Craft technology group (University of Colorado, Boulder).

"Turtle Path Printer" is an application in development. The basic idea behind the system is that users can steer a 3D turtle about the screen to create possibly complex paths; once those paths are complete, they may be printed out (on a 3D prototyping machine) in solid, tangible form. As early examples of the sorts of paths that can be printed out, the photographs here show a variety of knot forms (including a trefoil knot -- with three crossings -- and knots with four, six, and eight crossings), and forms based on the classical Moebius strip.