Zacks Words

My 2 year old son Zack still isn't speaking much so he has a speech therapist come out once a week to the house to work with him. He is doing real well. When we started the whole speech therapy process, the only real words we could get out of Zack was Dada, Mama, and pwa (please). He would also get out uh-huh (yes) and ah-ah (no). We are picking up new words at a good rate now. We have gotten Maw (for his grandma), More, Home, On, Off, Fa (fan), Baa-Oo (balloon) and today we got Pa-Bo (Pablo from the Backyardigans show) and Ahmo (Elmo).
I can not begin say how proud I am of him. He went from not being able to get out the sounds to being able to get some sounds out and also put 2 sounds together to form a word.
He picks up sign language pretty quickly too. That in itself has helped us tremendously. I really feel that his frustration level has gone down some. Not a lot because there is still a lot he can not communicate to us but hey at this point any drop in frustration is a blessing.