Sliced Skull
There are a couple of laser sliced cardboard skulls online but none that seem to be sharing the files so I decided to make my own for the Kitronik teacher evening. I found a 3D model of a skull in the Autodesk library and used 123D make to slice it in the desired direction. The result was slightly lopsided because the software slices from left to right rather than the middle outwards so I took the first 14 layers and mirrored them to make sure my skull was truly symmetrical. The whole thing was cut from corrugated cardboard 5mm thick (svg here)