If the top part of a child's dress doesn't fit, but the skirt part does, you can cut off the blouse portion, sew up the back part of the skirt, hem the waist area, insert elastic and make it into a skirt.
This is from an old memory of what my mother did for me when I outgrew a favorite dress. It lived on as a reincarnated skirt.
Login using the form on the top of the page to post feedback (if you are a registered user). If you have not yet registered, click here to do so. It's FREE!.