I recently bought the boys a DVD called Cat Sitter. It's got mice and gerbils and birds and fish and butterflies. Calvin LOVES it!!! He's more interested in some portions than others but he's become a complete couch potato and watches all sorts of TV now. Whatever I'm watching he'll take a look. I had to muffle my laughs at first because he was SOOOO cute just sitting in front of the TV completely bowling pin pose. I'll have to get a picture. Hobbes could care less about the TV.