Your mentioning your red/white/blue t-shirt with large peace sign necklace had me thinking back to favorite ensembles when I was around that age. I remembering pestering my mother for this beauty!! One of my best friends had the more patriotic color combo. I went for harvest gold/brown! w00t!
I also wore mine with a stunning harvest gold jersey knit peasant blouse (50../50 blend), or an equally scary harvest gold, 100% plastic buttondown. No pure cotton back then. Actually, here's the description of the shorts/skirt:
Acrylic knit bonded to acetate tricot! Mmmm, breathable! No wonder it had a zipper! You'd suffocate otherwise!
I wish I had a photo of the shoes... they were brown and were called, "Charlie Brown Shoes". I don't remember why, but I can see them in my mind. I'll have to search the almighty Google to see if they mention those. I don't know if the name was regional or national. My one sister and I both had them.
My time machine info retriever has delivered a photo of Mr. Thundra... circa 1970... It would be selfish of me not to share. :) Sorry for the poor quality. The time machine does not have a working scanner.
I think Thundra missed his calling as one of The Brady Bunch.