My Nephews' Handiwork

The picture below is of me and my nephews (eight and five years of age), on the subway last night.  My sister and my mother were sitting nearby.  We all went downtown, to Daley Plaza, to see the annual Christkindlmarkt, which was staffed almost exclusively by Germans.  I had a grand time showing off my skills in Deutsch.  I said "vielen Dank" to the woman who sold us some hot chocolate; the littlest one repeated it perfectly and asked what it meant.  (Thanks very much.)  Perhaps he has a faculty for languages!