My 4 month old does all the time. Both of my daughters have.

Kyler did at that age and still does

my daughter did and she still does sometimes Lol it's so cute

@valerie_jean

it's so cute. he learned right before he turned 6 months. I'm guessing he loves doing it so much cause it's a new to him sound he can make

Lol my son did and still does 😂