Just like Americans, Koreans have their own version of Chicken Soup called "Samgyetang." The ingredients include cornish hen, garlic, sweet rice, jujubes, ginseng roots, green onions and water. I would recommend http://www.maangchi.com/recipes/samgyetang as she has a video on how to cook it.
According to an article written by Jane Han in today's Korea Times, Korea plans to export "Samgyetang" in a processed and packed form starting early next year. Meanwhile, you can try to cook it yourself or find a Korean restaurant that makes it.
Sometimes I don't have time to purchase all the special Asian ingredients, so I make a simple version just using the cornish hen, garlic with salt and pepper. My kids love it this way too.