Writing instruments are tools used to produce text or drawings on a surface, typically paper. Common examples include pens, pencils, and markers. Each type has its own unique features, such as ink flow in pens or graphite in pencils, allowing for different styles of writing and drawing. These instruments can vary in design, from simple and functional to elaborate and decorative. Some writing instruments, like fountain pens, are favored for their smooth writing experience, while others, like highlighters, are used for emphasizing text. Overall, writing instruments play a crucial role in communication and creativity.