Here's one for da kidz - a pile of computer chads. Oh yes, how high tech are we today !
A little history lesson for those too young to know better. Programming computers wasn't always the fun keyboard based task it is today. If you think rattling out some HTML (yes, I know that's not proper programming but if you know that too then you don't need to be told about chads do you or didn't you pay attention during your "History of computers" module ?) for your web page is tough, imaging having to write each line by punching holes in a card. Then putting these card into a pile that go into a reader. Then dropping then and having to work out what the correct order is or the program won't run.
The end result of all this work would have been some top software able to do calculations that your mobile phone would laugh at nowadays and a box of little card rectangles.
Railway modellers found a use for this waste product - the chads as they were known happened to be very close to the size of a 4mm brick. People would build their card buildings and then painstakingly stick individual chads on the surface making great efforts to keep the courses level and regular. Many, many happy hours would be whiled away in this manner and the results can be most impressive. Often better looking that those from plasticard.
Of course the biggest problem you find if you fancy having a go at this is acquiring the chads. My Nokia doesn't produce anything nearly as useful and I haven't seen a chad-maker since school and even then it was a relic rather than a useful bit of kit. My supply was purchased years ago from someone who offered them for the price of postage in the Railway Modeller letters page. I've no idea how many are in my tin and I'm not going to count them, but they are staying locked away. How knows I might fancy having a go at an individually bricked warehouse one day...
Wikipedia on chads.