T-shirt dresses are kind of perfect for her because she can still run around feeling pretty while having the freedom to play. There are lots of tutorials around blogland for t-shirt dresses, so I'm not going to post one here. But just to sum it up, you cut a t-shirt to the desired length and add a skirt - easy as pie. I actually made the top part using Made by Rae's Flashback Skinny Tee pattern. The skirt is just the width of the fabric (cut to 15 inches long, I think?) and gathered to fit the skirt. I added a waistband sash at the last minute, and it made the dress.
The fabric for the skirt is a western print by Samantha Walker called Saddle Up (in gray). I was really tempted to add a matching horse silhouette to the t-shirt top, because Samantha Walker also designs for Silhouette, but decided to leave it off. It would be fun to do in the future though! Kind of opens up a new door of possibilities, being able to match heat transfers exactly to fabric prints ...
Giddy-up.