Traditional handicrafts from any country usually make excellent travel souvenirs since they represent that region's history and culture, and are not available for purchase anywhere else. This is the case with the many traditional handicrafts that can be frequently spotted in Insa-dong or Bukchon. Some perennially-popular items include dolls wearing hanbok (traditional Korean dress), mother-of-pearl keychains, and humorous folk facial mask sets. The traditional fan is another popular item because it is beautifully crafted and can serve as a decorative piece in addition to its usefulness in hot weather. It is also a gift of great significance, since the fan is traditionally offered to loved ones and is very environmentally friendly.
Check out these links for more information:
Seoul's Traditional Markets
Myeong-dong Tourist Information Center