Simple Calculator
in an animation
http://www.youtube.com/watch?v=nnd1nH75oys
If you watch the video, you see it plays a very small part, so I wasn't about to spend that much time on details that weren't necessary. Its a cost/benefit thing. If its small in the movie, make it small in a blend. ;)
The character and library setting is also on Blendswap, and the animation is part of series - "Giants of the Earth" on Youtube, username dx31979 check out the page:
http://www.youtube.com/user/dx31979