Tony seems to understand much more than he can say.
Last night, Dad saw Tony throw a piece of paper on the floor. Dad told Tony to put it in the garbage can -- Tony did so.
A previous evening, at bath time, Dad was able to get Tony to turn off the t.v. and DVD player. He also got Tony to turn off the light that was on by the two devices. For Dad, this was lovely because he didn't have to get up from bed to do it himself -- Tony did it all himself.