The term 'Pens and Needles' can be summarized by the crossword solution 'Styli'. Styli are a type of writing instrument that have been used since ancient times. They are usually made of metal, wood, or plastic and have a pointed tip at one end. They are used for writing on paper, clay tablets, wax tablets, and other surfaces. Styli are also used in various types of electronic devices, such as touchscreens, to interact with the device.