From the Site:
"Club Penguin is a virtual world where children can play games, have fun and interact with each other.
Each player starts by choosing a penguin, giving it an identity, and then exploring Club Penguin. They can interact with other penguins by chatting, playing games, sending greeting cards, or using emotes (emotion icons) and using a set of predefined actions. By playing games, players earn virtual coins which they can eventually use to buy clothing and accessories for their penguin or furniture for their igloo. Club Penguin is designed for 6-14 year olds, but is open to children of all ages."