Dear Juno by Soyung Pak is a story of a young Korean boy whose grandmother still lives in Korea.  His grandmother sends him letters, but he cannot read Korean.  His grandmother sends him a picture and a dried flower.  He knows she has a new cat from the picture and has a flower garden from the dried flower.  Juno sends his grandmother pictures that he draws.  From his pictures grandmother knows he wants her to visit.  She then sends him a small airplane letting him know she is coming to see him.
This would be a great book to show students that there is many ways to communicate with other people.