Here it is an small machine that stacks LEGO bricks one over the other.
The idea is pretty simple but it really works. You need to feed the bricks manually and then it start stacking one after the other until you have a pretty big column.
(Photo by Oskay)
If you order the colors in a proper way it can build interesting patterns but anyway, the video…
Like? Not bad at all. Well, just check this LEGO Printer that replicate another cube by scanning its sides and then build it using LEGO bricks on its own!.