\documentclass{beamer}
\usepackage{beamerthemesplit}
\usepackage{xcolor}
%\usecolortheme{rose}
\usetheme{Warsaw}
%\usefonttheme{serif}

\usepackage{fontspec}
\defaultfontfeatures{Mapping=tex-text}
\setmainfont[SmallCapsFont = Fontin SmallCaps]{Fontin}

\begin{document}

\begin{frame}
  \begin{itemize}
  \item<1-> Eggs
  \item<2-> Plants
    \note[item]<2>{Tell joke about plants.}
    \note[item]<2>{Make it short.}
  \item<3-> Animals
  \end{itemize}
\end{frame}


\end{document}