First, let me introduce Club Penguin to you. According to Wikipedia, Club Penguin is
an online game primarily designed for children ages eight to fourteen, although you can be older, developed by New Horizon Interactive and bought by Disney. Using cartoon penguin avatars, players can waddle around, converse, play minigames, and participate in other activities with one another in a snow-covered virtual world.
which sounds like Second Life for kids. Obviously I don't participate in Club Penguin at all, so why am I even posting this?
Well like other games, there are cheaters or hackers if you will. And I didn't think kids' games had hackers. Looks like I was wrong.
Recently, a Youtube user posted a video walkthrough of hacking club penguin. Testmssg (testmsg), the person who posted the video, even helpfully states that "The packet that you are looking for will say the amount of coins at the end of it." And lots of kids seem to be searching it.
Looking deeper, I even found a forum dedicated to Club Penguin cheats (presumably by testmssg), though I don't get the rationale of hacking a free game. Or maybe I do.
As you may have guessed, all the trouble is simply to gain more money aka coins in the game. Which could get a player banned. Which would probably lead to complains, whining on forums and elsewhere.
Sounds familiar? Guess they had to start somewhere.

