Please? Baby Sign Language

We are big fans of baby sign language and just a few days ago, our Mark, who is 14 months, learned to sign, Please.

I seriously think it is the most precious sign of all.  They are supposed to rub their heart, and here it looks like Mark is saying the pledge of allegiance! 

Is he precious, or what?

He was asking for another grape...can't you see how much he is enjoying the one in his mouth?  Please, mom?