My daughter (Stephanie, 4) is watching “Tom and Jerry” cartoons in my office. (Of course I have a fully-equipped home theater in my office. This isn’t the Dark Ages.)
She’s actively rooting for the cat.
“Go, cat! Get her, cat! Eat her!”
(Update: A degree of frustration with Tom’s lame performance as a mouser is beginning to set in. “She’s right there! Get her! Get her! Get her!”)