In going through a drawer looking for something ELSE this weekend, I uncovered this shopping bag from the 1982 World's Fair in Knoxville, Tennessee! As you can see, Pac-Man was all the rage at the time. I also remember a giant motorized Rubik's Cube that rotated as it "worked itself." Both those things were huge at the time. I think this bag has survived so well because of the thick plastic they used to use!
By the way, I did eventually find what I was looking for: a feather from a vintage Big Bird suit that a friend got for me 20 years ago! Mission accomplished, with a bonus.