DUUUDE. Avatar the Last Airbender WAS my childhood. I am enjoying the new series as well, but my heart will always belong to the Gaang. I've been paying tribute to all of my favorite fandoms lately since I've had a lot of time to devote to stamp carving.
Time: ~ 1 hour
(Oh, and just to clarify- the stamp only stamps one color. I used colored pencils to make it more interesting.)
Hope you enjoy!