We've seen a lot of interesting 3D printing projects taking place over the past 1-2 years. One group of 3 students in Australia, however, have come up with quite the unique machine. They used 3D printing to create a homemade Harmonograph which they call the 3D Genie. A Harmonograph is able to draw geometric designs, many of which are extremely beautiful and elegant. Read and see more on this project at: http://3dprint.com/33329/3d-printed-harmonograph