\frametitle {The Cell}
    \begin{block}{What are the attributes of a cell ?}
    \begin{itemize}
    \onslide+<1->
    \item Type
    \onslide+<2->
    \item Volume
    \onslide+<3->
    \item Center of Mass
    \end{itemize}
    \end{block}
    These are a few of the variables inside the cell class built for CompuCell.  We can
    interface with this class through Python