I have always loved music and have sung in choirs and small groups most of my life.
I sing to my grandson; one of my favorite songs to sing to him is: "Somewhere over the Rainbow."
More recently I started singing "The Little Drummer Boy". When I showed him a video of this song, he noticed the animals and made the appropriate sounds when he saw the cows and the sheep!
I think the best songs have a strong message and a beautiful melody!