Keep in mind that song is 78 years old. Why would you expect those children would respond to, or recognize it?
Gary.....because the song is a Classic that will go on forever. No different from As Time Goes By (Casablanca).
Also.....we're keeping up with ("good") new songs like Happy/Pharrell Williams and Uptown Funk. Why shouldn't they keep up with good "old" songs. And keep real music alive at the same time so we don't end up becoming a society of robots listening to and playing mechanical music."
I just wrote a few weeks ago that my audience won't "allow" me to play anything beyond the 40's, except for a few choice songs...New York, NY...Sweet Caroline. Of course, I'm exaggerating, but in general I have to keep my stuff in the 40's and sometimes even the 30's. And, personally, I still like playing those songs. There are so many Classics from that era that are still remembered that you can play them all day and not repeat a single one.
Mark