In my presentation I cover the concept of Child Themes (what they are and why to use them) and go through the process of creating one.
I include CSS modification, template modification, include tags, conditional tags, creating your own page templates and modifying functions.php.
I switch between slides and demos and provide links to resources and time for questions. My slides can be viewed on Slideshare: http://www.slideshare.net/thetracyl