OpenSCAD (www.openscad.org) is an Open Source (free) tool for 3D CAD objects. This presentation is designed to give you a high-level overview of 3D CAD concepts and the OpenSCAD software, as well as additional tips to begin learning and using the tool yourself.
This class doesn't require any materials, but feel free to bring along your laptop to play along with OpenSCAD while Steve does his presentation.
Here is a link to a pdf of the slides to be used in the class. (http://www.highergraphics.com/pub/OpenSCAD%20Class.pdf)
Instructor: Steve Graves (http://www.meetup.com/Tampa-Hackerspace/members/121670452/).
Cost: This presentation is free for members, $5 for non-members.