A few nice fast prototyping design images I located:
ITU Rapid Prototyping Workshop
Image by geekphysical
A speedy prototyping workshop for Master of Interaction Style students at ITU. An introduction to fast prototyping as a idea and as a practice, each in the swift and dirty sense (employing obtainable supplies to accomplish proof of concept) and by way of awareness of tools available such as the CNC machine, the Rep Rap machine, and use and knowledge of components, processes and communities. Element lecture, part hands-on prototyping complete with proof of idea from every group.