to AMOMENT, the OP: You know, on these types of photos, it doesn't make a lot of sense for the mom-photographer or the dad- or grandma-photographer to try and select the "best" shot...because these are family photos...photos of somebody's darling daughter, dear grandchild, or favorite little niece...whatever...each photo of a toddler at this age and stage of development is a wonderful thing to have, to keep, and to pass along for the future. I do not think that #3 is really "the best" shot...numbers 1,4,and also 5 are pretty good for what these are, which is "family shots" of a dear little daughter...
In general, I think you need to be aware of leaving more room for the child to "look into". That's the biggest flaw I see, along with poses that are shall we say "free form". But who cares, really....the important thing is expression, then focus, then lighting, then set design...in more or less that order. You're getting better. This is a lifetime activity. Not sure when you took up photography, but it cannot be mastered in anything less than years. If you keep shooting with this much effort and frequency, by the time she's ready for first grade, you'll be well on your way to a MWAC side bid-ness!!!! Keep shootin!