In the past 2 weeks, Jack has:
said many times "look at me! watch me mommy!"
initiated imaginary play on his own, with us or by himself
started providing feedback about smells
The smelling is really funny. Instead of "eeeeeww" he always says, "ooooohh, that smells bad," as if cookies were coming out of the oven or something equally delicious was underfoot.
He's getting seriously good at beginning reading. With some basic books he gets 5 or 6 out of 7 words in a sentence, if they are all on the small side.
We also see improvement in self care. He's getting better at dressing himself and wiping his nose and a few times last week he used the potty independently.