In 2014, I was extremely fortunate to get to see the infamous Main Street Electrical Parade on my first visit to Walt Disney World. While you're reading this post, here's the necessary music to get you in the mood:
Opening the show is both Casey Jr. and the famous "drum," which at this time still read "Disney's Electrical Parade," as DCA doesn't have a Main Street! Interestingly, the proper name was restored when the parade conducted its return at Disneyland in 2017.
...along with the Caterpillar and his mushroom:
Peter Pan's pirate ship is one of the highlights.
The variation on "Heigh-Ho" that accompanies Seven Dwarfs is quite the earworm and like the rest of the parade, pairs very well with the main theme, Baroque Hoedown.
I remember seeing a picture of this giant, smiling face leading the Pinocchio Pleasure Island floats as my first exposure to the parade. I was quite intrigued, to say the least!
I would warrant to say that most people can agree on Pete's Dragon, Elliot, being the most famous unit of the MSEP.
A remnant of the show's 1970s heritage is the awesome "To Honor America" flag float, complete with fireworks and an eagle at the end.
I especially love the little details, like the lights in the performers' hats!