Kim bap is similar to cooked sushi roll and is often given as a lunch box item for children and adults alike. American parents like to sack peanut butter and jelly sandwiches, while Korean parents sack Kim bap!
Here is an episode from Cathlyn's Korean Kitchen, a cooking show which airs on Time Warner Cable on Fridays, Channel 12. Cathlyn Choi Michelson shares her recipe on how to make Kim bap. If you plan to make it for your child, I would stick to just the meat and vegetables that your child is accustomed to eating. You can also use sausages instead of boolgogi (Korean beef). More recipes and information about this show can be found here at www.cathlynskoreankitchen.tv.