Well...hmm where to start, lol. They play, eat, do tricks, etc. You can even breed them (no, it's not gross, lol...just heart comes up, and the puppy/kitten actually looks like a mix between the parents) They have different personalities. You can adopt and download petz from the internet, and download different breedz (the game comes with 10 breedz...dogz has 10, catz has 10). It's also a screensaver, your catz and dogz run across the screen and play with toys, etc. It's really pretty cute...another amusing thing to mess with on the computer, lol. I'm going to attempt to post some pics of what they look like:
These are two calicos with a kitten (Gavin, Jester and Sprite).