Verbal Explosion?

We're standing on the precipice of a verbal language explosion.

I think.

I hope.

The Little Buddy still doesn't say much unprompted. There are about ten words that he says constantly and then a whole baby babble language that he uses the rest of the time.

But now, when prompted, he'll repeat just about anything.

Me: Say Matthew.
M: Mah-ew
Me: Say eye.
M: Eye.
Me: Say Garrett.
M: Dit-dit.
Me: Say Jesus.
M: Jee-uh.
Me: Say eat.
M: EEE!
Me: Say banana.
M: Nana.
Me: Say baby.
M: Bay-bee!
Me: Say hello!
M: Huh-o!

And on and on we go. Unless he's being a crab. Then I ask him to say all that stuff and he just stares at me as if to say, "You're a big dork and I'm not on display here!"