The cutest most adorable sound that is known to mankind

According to many mothers i'm sure the sweetest most melodic sound would be the beautiful harmonies of their children. Although I would wholeheartedly agree with this I must say the absolute creme de la creme is the angelic noise which I refer to as the coo/giggle gurgle of an infant. There are no words to describe the cuteness to put down all cutenesses of this noise.