I have often described my cat, Duffy, as "a little gymnast."  He loves to
climb, and anyone watching him would have a hard time recognizing that he is
blind (and has been since birth).  He left the Christmas tree alone except
for two occasions -- on the first day when I put it up and started
decorating it and on the last day when I started the process in reverse.  I
imagine his attention was attracted to the sound and movement when I was
working on the tree.

I just posted two photos of Duffy's "help" in alt.binaries.pictures.animals
(in this case, the photos were taken when I was starting to *remove* the
ornaments -- which Duffy aided by swatting several ornaments off the tree).

MaryL