Getting Older and Changing, Already

I noticed today and a little bit last night, that Natalia has developed some serious skills she did not have a week ago.  Here is a list of some of the things that little purples has been doing, that seem different.
She sees the bottle coming and locks in on it.  She can see further and looks up to follow the bird          
 mobile above the couch.  She is beginning to non-gas, smile.  She has some neck muscles, now.  
She is able to hold her head up for a second, nice and steady.  She is starting to coo.  She turns her head to our voices.  So interesting.