Club Penguin released a new pin on April 19, 2012 and can be found for the next 14 days on the Club Penguin Island. The pin is related to the Earth Day party which is at the moment at the Snow Forts. This is how to find the pin as fast as possible:
Login on Club Penguin and go to the Plaza using the map.
Now enter the sewer, the entrance is somewhere in the middle of the room.
You are at the Cave/Pool now. Here waddle to the forest pin located in the middle of the room.
You will be asked if you want this item and you will select “YES” and it will be added to your inventory.
Well, the pin doesn’t look that bad, but it’s not original since Club Penguin used that picture of trees before.