I found this tutorial for a pinafore top and i have some lovely strawberry fabric which was waiting for the right project to come along and this is perfect
Pinafore Tutorial by Fort and Field
This dress was made using a pillowcase, cool isnt it?
Pillowcase Dress by Red instead blog
Now a little twirly action maybe ?
Twirly Skir by House on hill road
or isnt this dress the cutest?
Bubble dress by My Mama Made it
I hope these tutorials inpsire you to make something for a little girl 
Cheers
