The boy makes two consistent sounds: "dadadadadadada" and "mamamamamamama"
But perhaps I could call them proto-words, because they have meanings.
"dadadadadadada" means "this is a fun sound, I like life, I am content right now, I like this"
"mamamamamamama" means "life is miserable! why won't someone fix it? ahhhh!" It should be noted that this boy is not a whiner. He has to be really sad to let us know. (Unless of course it's nap time.)