Brynnberlee Brooke Dress -- downloadable pattern available at Pink Chalk Fabrics. Thinking about trying to make this for my little niece. I've never made any clothes before, but this looks fairly simple.
Simple Summer Dress for Girls - Follow this tutorial to learn how to sew a dress that will let her run and play in the summer sun. This free dress pattern only has four pieces, making it quick and easy for beginner sewists.