Cracks me up

Another new trick of Zachary's is to cry while he sticks his tongue out...so the sound that comes out is about the funniest you've ever heard. Try it for yourself: stick your tongue out in a point (the pointier, the better) touching both your top and bottom lips (see this for reference) and whine or cry...it's hilarious.

Somehow, I don't think that's the effect he's going for, however.