Yodelai He Yo Yo

Little man's favorite word is Yo and YeYo (yellow) and now he is singing it with me. On our long drive home I was singing High on a Hill from Sound of Music.

I would call "High on a hill was a lonley goat herd"
He answered back with Yo Yo Yo dee Yo!
"She answered back to the lonley goat herd"
"yo yo yo dee yo!"

My Goodness he melts my heart!