The Old Typewriter

Recently in a home far, far away, children discovered an old typewriter in the attic of their home. The father had to explain to the kids what this strange object was. So he put a piece of paper in the typewriter and began typing, the kids were surprised and could not believe what they saw. Almost with one voice they asked, once they noticed the typewriter was not plugged in anywhere, does the typewriter work with batteries. The father laughed and said no kids, it works without batteries and it does not need to be plugged into the wall to work either. The kids were impressed and said now why has no one ever discovered how to that before. Amazing!!