I used this Oliver+S pattern: The Playdate Dress. I purchased it from Creative Sewing Machine Center as a paper pattern, but on the Oliver+S website, it's only available as a digital download. You can get it here.
It was a dream pattern to work with! Oh my goodness! I'd love to sew her patterns every single day. Especially since there were a few new things that I hadn't done before, and her directions were so simple and easy to follow along. This dress literally took me two naptimes. That's it. I know, amazing isn't it?!
I used Michael Miller Thar She Blows for the main part of the dress, and matched it with this adorable polka dot (navy with white) that I forgot to look at the selvage for the designer name. Oops. I also made a matching diaper cover to go with it. One thing that I love about this dress is that it has pockets (which, are kind of pointless with an infant but they make this momma happy, so that's okay)--I used the polka dot print for the pockets! A little surprise! oh, the pattern called for three buttons on the front yoke but I only did 2 because I bought a size up in buttons (because it had to match) and I didn't like how the three looked on it. When she wears a bigger size of this dress, I think three will be perfect.