Your three year old child picks up her cute little scissors and cuts through the paper. As she does so you almost totally ignore her. Her scissors are sharp enough to cut the paper but have blunt ends, plastic parts and they are difficult to actually hurt her. This was not always so.
Scissors have been around for over 3,500 years. They apparently were first invented in Egypt around 1500 B.C. and were made of bronze. Each piece of metal was sharpened on one edge and then each scissor rubbed against the other scissor using a fulcrum to provide the pivot. They then cut the paper or cloth or whatever needed cutting. Slowly the scissors spread throughout the world.
The Romans, in about 100 A.D., improved the design by creating cross-blade scissors. Most of the improvements to scissors are lost in time and we cannot trace their origin. Somewhere in time someone found that greater control could be found by adding a screw or rivet in the middle of the two scissors and adding loops for fingers.
Londoner Robert Hinchcliffe, in 1761, invented steel cast scissors. Today almost all scissors are steel cast for the cutting edge. Children’s scissors will have the steel cast blades with plastic handles and coverings to protect the children from cutting themselves.
Scissors needed to be sharpened to be effective. To protect the edges artisans would often place them into a cover, usually made of leather. As they were often handmade they did not just throw them away when they were no longer sharp. Scissors in a family could last for generations.
There is not much known about the history of scissors. What we see above is all there is known about it. As people made improvements they just made them and continued working. To most of them it was just another tool and not all the extraordinary. Most of the improvements were made by ordinary people making ordinary changes to an ordinary piece of equipment. No big deal.