There are three inverted pleats at the neckline (difficult to see, I know).
The pattern is the "Alicia" dress from Ottobre 3-2009-5. It has a contrasting hem panel and neck binding (obvious from the picture, I suuppose), elastic-gathered sleeves and buttons in the back.
I know it's not strictly necessary to have all these pictures, but I couldn't narrow down my selections any further. I love this baby stage.
The bandana print fabrics are both quilting cottons from Hobby Lobby.
After doing the "photo shoot" I realized I really needed to make matching bloomers to send with the dress. For those, I used the "Cassia" velour shorts pattern from Ottobre 3-2009-2. Rather than velour, I used a poly/cotton poplin from fabric.com and it worked fine.