First, it's the sizzling hot Fire Theme:

author: Evilboy
hot hot hot, the fire theme is the choice of this season
Then, we have the cosmic Avatar State Theme:

author: Evilboy
Deep blues and purples permeate the ambient with a touch of galactic interspace in this theme
WE HAVE AIR!!

author: David, The Last Cabbage Bender
WOOHOOOO!!!

Rumbling down, here comes the Earth skin!

author: David, The Last Cabbage Bender
*rumble rumble rumble*
Here is the cool Ice skin

author: David, The Last Cabbage Bender
Ice Ice Baby
At last, the Water skin has been unlocked

author: David, The Last Cabbage Bender
Dont forget your scuba diving kit
Halloween theme haunts the forums!

author: Gotag
Halloween theme returns with a new look!

author: Taunt
Who you gonna call?
Here's how you can set them as your default skin:
1- Go to your profile (from the momo icon at the top).
2- Select "modify profile" from the top menu.
3- Scroll down to the Account Preferences section.
4- Click on "select skin". From there, you can toggle between all the skin options.
5- Click the modify profile button and the bottom and... PRESTO! you have your new skin set.
next time you log on, the skin you chose will be set automatically. if you wish to use a different one, you have to change it again from the modify profile screen.
--hold on for new skins available soon!! Earth, Water, and Air will be uploaded in the following days previous to the premiere of Book 3: Fire. In addition to these new skins, remember that we have the Dark Theme, and the Default skin currently available too.
Stay tuned