OREO Separator Machine It is astonishing that technology that was unthinkable in manufacturing 50 years ago is now so cheap and so easy to do that you can play around with it. Also, the dream of the 90s is alive in Portland.
Portal Prelude I remember a friend who made Space Invaders on his TI-83 in high school. This is pretty damn impressive.
Todai-ji in LEGO® With some pretty awesome folding action! There are even how-to instructions embedded at the end of the video.