Club Penguin is today the biggest, most successful social network for 6–14 years old kids.
Club Penguin is a game and educational resource over a children’s social network with penguins as avatars for kids in over 190 countries globally. (Source: Mashable).
Club Penguin was born on October 24, 2005 when it started with 15,000 users, and by March 2005 had 1.4 million, then 2.6 million kids in September, and had over 12 million accounts by 2007 of which 700,000 paid subscribers made $40 million yearly for the business.