The Club Penguin players (normally young children) need an adult's permission to create an account. Once they do that, they'll be able to personalize their own penguin by choosing a name and a color. As a free gift, they'll also receive an item of clothing such as a hat or scarf.
Once they've created their penguin, they'll be able to move freely around the Club Penguin world, made up of dozens of different scenes in which they'll be able to interact with other players. It's possible to talk to any other person through the chat, as well as participate in games, buy new clothes, personalize their character, etc.
Club Penguin is half-way between the traditional MMO and a social app for kids. Some may say that it could be dangerous to let kids freely navigate though this little virtual universe...and the truth is that this could be true.
Needs at least 193 mb of free space
Requires Android 4.0.3 or higher