Although the Air Nomads are extinct in the time line of the show, due to the actions of Fire Lord Sozin, their culture is represented through the carefree attitude of the surviving Air Nomad and Avatar, Aang, and his lifelong bond with the sky bison Appa. Use clay to make the sky bison whistle used to call Appa, or make a smaller version of Aang's glider staff. Use the whistle shown in the episode "The Waterbending Scroll" (Season 1, episode 9) for a model. Use modeling clay and a Popsicle stick to create the whistle. For an extra touch, add white strands of silk thread to resemble sky bison fur.
The Southern Water Tribe character Katara has a necklace that was passed down by her mother and grandmother. The necklace has a symbol resembling the Waterbending emblem: three swirls in a horizontal line and three lines below it resembling ocean waves. Blue is the primary color of the Water Tribes. When making the necklace out of polymer clay, paint the main body of the clay a bright blue and allow your child to etch their own design into it with white or gray color. For inspiration, watch the episode "The Waterbending Master" (season 1, episode 18.)
The main character from the Earth Kingdom is Toph Bei Fong, the blind Earthbending girl who teaches Aang and invents Metalbending, which allows her to craft an armlet out of a meteorite fragment given to her by Sokka. Use a strip of posterboard for a rough upper arm mold and wrap polymer clay around it, then paint the clay black to craft the armlet. Allow an opening to be able to remove the armlet. For reference, watch the episode "The Runaway" (season 3, episode 7.)
The Fire Nation royalty characters Zuko, Azula, Iroh and Ozai wear hair ornaments to hold their topknots in place. Make one of these hairpins for a child with long hair by gathering the child's hair into a half-loop at the crown of the head. Use the thickness of the hair mass to determine the hair ornament's width. Use a strip of posterboard taped together to make the mold. Mold the piece out of.clay. Paint the clay gold and have your child cut their chosen ornament design out of cardboard or posterboard. Paint it red or bronze, then attach it to the back of the main piece with Superglue or tape. For a more ornate version of the hair ornament, use the one shown in "The Avatar and the Fire Lord" (season 3, episode 6) for a model.