Hay day - Farm with friends and family
Panfu - Panfu is really a virtual world focusing on kids aged between 5 and 14.
My Free Farm - My Free Farm is an Entertaining, Role-playing, Management, Browser-based, Online, Single and Multiplayer Farming Simulation created and published by7 Upjers GmbH & Co.
Neopets - Neopets is an Amazing, Virtual World, Massively Multiplayer Online, Role-playing and Fantasy-based video game developed and published by Viacom.
FarmVille - FarmVille lets players cultivate their farms by plowing, planting and harvesting crops and trees.
Animal Jam - Animal Jam is really a virtual world for kids that includes real animal and plant information towards fun storylines which are maintained by National Geographic educational content.