What Is a Slinky and How Was It Invented?
Most kids have played with a Slinky toy at one time or another. You may even have one or more Slinky toys at home…
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Invention
When Was the First Workable Ballpoint Pen Patented?
The first workable ballpoint pen was patented in 1937 by László József Bíró, a Hungarian living in Argentina, but ideas for ballpoint p
What Is a Wetsuit and How Does It Work?
If you plan to go exploring deep under the sea using scubagear, there’s one essential item you’re going to need: a wetsuit. Sometimes cal
Why Do Fashions in Clothes Change?
Fashions in clothes change for almost as many different reasons. Among the chief causes are changes in the kind of work we do, the cost and
Who First Used Keys?
The first known form of lock and key was used by the Assyrians in the Middle East about 4,000 years ago. This was revealed by the discovery