What Shall Our Show Theme Be?

Thank you to all who have responded to the first post. Now that we have all had a chance to get familiar with this format lets get down to it.  The first thing we need to do is decide the theme for our Vertical Team Show.  It can be almost anything.  I suggest something a little generic like portraits or still-life but not so generic as "elements of art."  We need the show to progress and development across the grades.  What are your thoughts or suggestions?  I would love to have all of your input so please respond in the comment box.