This document discusses the science behind common stationary items like pencils, erasers, and pens. It explains that pencils are made of graphite, which leaves a mark when rubbed on paper. Erasers work by having molecules that are stickier than paper, allowing them to pick up graphite particles. Pens function through a small ball that rotates in a socket and transfers ink from a reservoir to the paper. The document aims to increase understanding of everyday objects and not take their workings for granted.