Four months and quickly turning into a little boy

I am sorry that I haven't updated in a little while. Grey is getting busier everyday and we have noticed definite little boy qualities starting to surface. I was always a little worried that the rambunctiousness that I have seen from other little boys was going to overwhelm me but everything that he is doing is so cute and endearing. As soon as he could he has wanted to live in the standing position but now he wants to bounce up and down on our laps as well. The other day he was nursing and trying to bounce (horizontally) against the arm of the chair. Not so comfy for mom!
He is a non-stop drool machine so he has a lovely rash under his chin and lives in bibs. When we were getting ready for his arrival I did not know what we would need so many bibs for but now he needs a fresh one every hour or so.
Other than that, he is absolutely "healthy" bordering on chunky. He was 17 pounds at his last doctors visit and all on a liquid diet. He is sleeping very well and taking all of his naps in his crib!
Ok, here are a ton of pictures and videos...

Before we were taking naps in his crib

Ducky must die!

He has a Sophie the Giraffe. Ridiculous but apparently necessary.

His new jumperoo

Apparently our moods don't really have an effect on our child's mood

Doing a handstand on Mommy's face

He likes to suck on his jumperoo. Yuck.

Not impressed

"You're So Vain"

I think they like each other

I think they like each other too

Chunky baby cleavage

The usual squealing

Rolling over

Figuring out the jumperoo for the first time