I've been wanting to do this custom for a LONG time. The hardest part was finding the right figures to use. Here is Avatar Aang as an adult. Also with him is adult Blue Spirit now an actual ally with Aang. I also have young Aang with teenage Aang. I used Zartan's head and G.I. Joe resolute Stormshadow's body. I had to sand down the shoulders/collar bone a bit to not make him look like he was all neck. Then painted the figure in shades of orange for the pants and skin tones for the upper body and light blue for the tattoos like he's in the Avatar State.