Robotics company Roboteurs wanted to create a line of products that would allow students to explore multiple robots while only having to purchase one kit of parts. They developed a line of 3D printed creatures, each of which can be assembled using the same standard components. These robots are called Printabots and the files for the 3D printed portions are available for download on Thingiverse or can be printed for you by Roboteurs. Check out more details about the Printabots over at 3DPrint.com: http://3dprint.com/94481/3d-printed-quadraped/