This is crazy!

iamntbatman

Just a little background info: LittleBigPlanet is a game for the Playstation 3 that's like an old-school 2-D platformer (think Mario) but comes with a really powerful set of editing tools so that you can create your own levels. This guy actually used the level creation tools to create a functioning calculator that can add and subtract two-digit numbers all by using a system of ropes and pulleys to create mechanical logic gates (in other words, a giant mechanical contraption that functions in a similar way to electronic logic gates in computer chips). Here's a video of the calculator in action:

http://www.youtube.com/watch?v=ZiRgYBHoAoU

JouteiMike

Wow!
That's impressive. Says it took one week to accomplish...I wonder how many hours per day.