I made a pillowcase dress from a pink pillowcase in my linen closet! It turned out very cute... I picked up some trim at WM to add to the next one. I am going to have my friend that shops garage sales look for next to new pillowcases to make some more.
As for the Britches for Boys - I have a pattern for shorts that I was going to use for my GD Violet that I will use... I have some heavier fabric that I was going to make a bag from for them. I like to idea of safety pinning the elastic so they can be adjusted.