Isn't she a little young to know that song?

Grandpa Ken and Grandma Dot are in town for the weekend. They arrived today around 1 pm and we went to lunch. It was just Isabella - Liam and Maddie were at school. On the drive to the restaurant, Isabella began singing a song. Perhaps you'll recognize it.

Isabella: "Grandpa and Grandma, sittin' in a tree. K-M-F-S-Y-N-G. First comes marriage, then comes... marriage. And a baby in a ba-by carriage. Ummmm... I don't remember the rest of the words. I learned that from Katie." (the 10 year old neighbor two houses down.)