One of the Illustrator tools that you will use the most is the subject of this lesson. A single tool for drawing is the pen. You can use the pen tool to create unique shapes and lines rather than pre-made ones. The pen tool is actually something to get used to, despite its seeming simplicity. Fortunately, once you master the pen tool in Illustrator, it also comes naturally to you in other programs. Creating your own polygonal artwork using only triangles you made with the pen tool will be an intriguing task at the end of this session.