Ok, so the next tool is actually the shape tool. But we already covered it. So lets look at the paintbrush tool.

The paintbrush tool is used to make free form lines. It will just draw wherever you move the mouse around. It can be hard to control unless your using a drawing tablet.

The hidden tools are the Blob brush and the Pencil tool.

The Blob brush works exactly like the paintbrush tool except AI will automatically smooth jagged spots into curves.

The Pencil tool creates something that looks very much like the Paintbrush tool but it makes a series of joined anchor points with handlebars so you can manipulate it to perfection.