This is the Claire pattern by Sandi Henderson in her Portabellopixie line. It was such fun to put together, and contains four different styles within the pattern. This one is a little biased towards serger use. I happen to have my mom's, so I'm lucky. It calls for a rolled hem, but you can substitute a regular hem at the neck, cuffs, and bottom with more work (thus, skipping the serger.)
It also utilizes elastic thread, but don't be deterred. It's easier than it looks. On this pattern, I learned how to gather on my serger... way easier than doing it on a regular machine. There's a peasant top version in this same style, just shorter. That's next on my list for her.
My last little bit of advice would be to figure out length before you put on the gathered ruffle at the bottom. I like her dresses to be short enough that she can run, and this one's a little more restrictive in terms of fullness and length. Otherwise, I'm thrilled with the pattern and will get plenty more use from it as the sizing goes from infant to 8 years.