“Big Mess o’ Wires 1 is an original CPU design. It does not use any commercial CPU, but instead has a custom CPU constructed from dozens of simple logic chips. Around this foundation is built a full computer with support for a keyboard, sound, video, and external peripherals.”
The guy built a CPU pretty much from [...]

An eyetracker records the movement of the visitor’s eyes. A robot hanging from the ceiling on top of a large pile of paper makes one dot for every point the visitor has been looking at. This results in large scale images showing how the same objects have been seen differently.
Makers & Spectators