Have some fun with your Windows desktop with teh Desktop Pet. The Desktop Pet is a virtual pet that actually lives out its life on your desktop. Users can feed it, play with it, watch it walk around your desktop interacting with your trashcan, and other desktop objects that come with it.
The pet isn't just randomly walking around, it has a sophisticated artificial intelligence engine that gives it moods and desires and based on them will perform various actions.
Version 1.01 of the virtual pet updates the graphics to give it a more "teddy bear" look and smooths out some animations, updates the AI a bit and more.
The desktop pet is only $9.95 ($8.95 if you have Object Desktop) and is a great diversion or simply something that can run in the background (it uses virtually no CPU when it's covered up).