If you have some old keyboard lying at home that is no longer in working condition, I would suggest you to turn it into something useful. Just like Prasanna Gadkari, who is fond of making clocks of all sort, takes the advantage of computer keys. He turns these keys into a solution to find out the time and names it “Missing Key.” The basic focus was to highlight the sleep key that no longer can be found in modern keyboards, and has lost its significance long back. The sleep key points at 9 o’clock, but for rest you might have to rack your brains a little, however the four basic time units are pretty clear.