In 1976, I traveled to the Magic Kingdom with my parents and younger siblings. It was the bicentennial year, and I have a distinct memory of Mickey, Goofy and Donald, representing the "Spirit of 1776" painting, leading a Main Street parade.
It was Easter week of 1976, and a thunderstorm came through late afternoon that had everyone running for cover. My Dad got us back out into Fantasyland as soon as the rain lightened up and onto the line for 20,000 Leagues Under the Seas. This was way before Fastpass, and the stand-by line was always very long. After the storm, tho, there was maybe one other group ahead of us, and we got to experience the ride without a huge wait on line.
Afterward, we went somewhere in Fantasyland and got very tall brownie sundaes. Mine was a strawberry and vanilla swirl soft serve on top of a classic brownie. I don't know if this was the "strawberry swirl" mentioned previously in this thread, but that evening in 1976 has been a happy memory of my teen years ever since.
Anyhow, the sundae was the bomb, and I wish I could get one on my next trip.