Ideas?

I think it is time I obtain a new Halloween costume. I'm volunteering again this year at the Pacific Science Center so it has to be a G-Rated costume. I'm just at a loss. I was thinking of obtaining a simple blue dress and making a white apron, buying an Alice band (thick black headband), tossing on my brown Mary Janes and going as Alice in Wonderland. Or else making a simple blue jumper and wearing a white blouse under it and going as Dorothy. But I just don't know what I want to be. Looking at patterns and/or costumes online isn't really helping me either. If I didn't insist on chopping off all my hair all the time I could've had the braids to do Pippi Longstocking. :) (I did that once when I taught school in Fairbanks. My hair was down to my ass at that point and so the braids went out farther than my shoulders. I felt a little bad as I saw a young lady also with Pippi braids who weren't nearly as long. She looked a little crestfallen when she saw mine.) I was never really that good at this as a kid which is why I've always kind of hated Halloween.