Dad tells him that him loves him ... the response of this 3 month old baby is amazing !
Usually to listen to the first words of a child, no matter how hard you try to stimulate it, you have to wait at least a year. Hence the astonished expression of the young dad protagonist of the video, when he tells his 3 month old baby "I love you", the little waits a few seconds and then launches into a very realistic response. Wow !!!