Andy says he has a few and the kids love them! You might want to give the
site a look. Andy teaches middle school -- but I think the step by step
processes are good for elementary too.
If you come across a Great Site for Animals in Art ---or a great artist who
uses animals - forward your sites on to me. I am planning this theme for
May. April is Art and Math month for Great Sites (I will find as many
artists as I can and will fill in)....so as you find artists with math
and/or science connections send them my way too (or post to the list and I
will find them).