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Beginning of use of pen and ink marked the start of new era of easier recording of information. Without them, early scientific discoveries would be forgotten and development of humanity would be much slower.
At the first glance, who could tell that the first ballpoint pens appeared some 130 years ago? But they did and were intended for writing on leather. Today, billions are made and sold every year and we almost cannot imagine our day-today life without them. Read more about ballpoint pen history.
Crayons in their early forms appeared in ancient times but we started using them in 19th century as art mediums. Today they are used by children but are still important in art. Read more about history of crayons.
Highlighters are useful tools: you can use them to mark dates on a calendar, parts of the relevant text in a book or any other use where you need highlight something on paper. Thy influenced our lives so much that we can even find them in some computer programs. Read more about history of highlighters.