\documentclass{ppex}
\nonstopmode
\usepackage {pstcol}
\pagestyle{empty}

\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage {pstcol}
  \psframebox{The dragon}
  \psframebox{\psframebox[linecolor=green]{ate}
     \psframebox[linecolor=blue]
       {\psframebox[linecolor=red]{the women}  and
        \psframebox[linecolor=red]{children}%
       }}
\end{document}
