I like how Gavriel Zev nods his head to say yes, or shakes it to say no.
Or how when I ask, "who likes bananas?", he'll shout out "MEEEE!!!"
Or how he'll sign and try to say "book!" because he wants to read while I change his diaper.
Lately, he's been saying more two syllable words like "squirrel" or "airplane".
His speech is accelerating so much.