The Facebook game "PetVille" lets you create your own virtual pet and take care of it, and even provides you a yard for your pet to play in. You can reach the front yard using your pet's control panel. The front yard is a good place for your pet to play with friends or relax. The front yard is accessible from any location you are in, including the Enchanted Kingdom and Tahiki.
Instructions:
1) Launch "PetVille" on Facebook in a Web browser. Wait for your pet's home to load. Close any messages that appear.
2) Click the front yard icon on the house located in the lower right corner of the game screen.
3) Wait for the front yard to load. If your front yard is not complete, click "Get Supplies" and ask friends for the supplies needed to finish your yard. You cannot fully access the yard until you receive all of the supplies.
Tips & Warnings
You must return home to access your front yard if you are in another location, such as Tahiki. Click the "Home" icon in the lower left corner of the gameplay screen to return home.
Source: eHow