Growing up in the 70s, among the things I sought out in our house to play with was an old manual typewriter. It was endlessly fascinating to me. I liked playing with all of the mechanical bits. Trying to jam keys, working the carriage return, scrolling paper through it, pressing the Shift key and looking to see how it moved the entire basket of typebars, overtyping to make new characters, watching how the ribbon advanced with each keystroke and rewinding it by hand, etc. One thing I had forgotten, which was mentioned in this article, was figuring out how to set tab stops, which allowed me to either stutter the carriage across, or make it fly free from one end to the other.