WoZ PC is more like a preview of the Wii version, but still a fun game for kids.
While the animation and customization in this game is very good, it is very lacking in other areas compared to the Wii version. You start off only being able to choose from 6 different species and as far as I've noticed, those are the only 6 species you can get. The focus of this game is not so much building the zoo itself, but rather interacting and taking care of your animals by cleaning them, playing with toys, checking their health and petting them. A lot of joy and giggles can be found in simply watching the animals you created run around and act silly, as their behavior is very well animated.
Species:
1. Big Cat
2. Small Monkeys
3. Giraffe
4. Horses/Zebras
5. Panda
6. Koala
(Much smaller selection of animals than WoZ Wii/DS)
You're much better off getting the Wii version of this game if you can. Any lag can make the PC version of this game a bit frustrating when trying to move the cursor around, even on newer PCs. This version is basicly a preview of the Wii game, most of the same graphics and animations but a limited selection of species and customization. If however you don't own a Wii, World of Zoo for PC is still a great game for kids and worth picking up.