Just replace the mouth with adult mouth that has been fitted in. You notice how its rough looking, thats to help cover up the differences
How Do They Make The Baby Look Like He's Talking On That E-trade Commercial,can I Do That On My Computer?
You can go on www.babymail.com and then you have to have an mic or you can just type down the words you want the baby to say and by the way you can send them to ppl to
Hes' an Alien.
Maybe they used green screen pacifiers. Just a guess