PowerPoint comes with dozens of free shapes; circles, stars and even smiley faces are only a few clicks away. If you don't find a shape you like, draw your own using the built-in free-form drawing ...

The Draw tab in Office allows users to make drawings in documents or slides. The Draw tab in PowerPoint allows you to make sketches with pen, pencil, and highlighters; it also has features to convert ...

If you want to use PowerPoint's capabilities to illustrate how two or more data points compare in magnitude, it might be appropriate in some cases to use proportional shapes to make the comparison.