The Poll web part allows you to insert your own Poll on the page.

You can modify the design using standard CSS styles, skin file, or by modifying the CMSWebParts\Polls\Poll.ascx file.
The styles are described in more detail in Developer's Guide -> Modules - Polls -> Design and styles.

Help URL: http://devnet.kentico.com/docs/webparts/index.html?poll_overview.htm