Disney Dan has a series of videos he's made over the past several years that trace the evolution of costumed Disney characters. Mickey Mouse was making public appearances decades before Disneyland opened, and he is the first character to get a deep dive into the costume. You'll learn some stories you haven't heard before, like how the first Mickey and Minnie at Disneyland were borrowed from the Ice Capades because Walt didn't have any cast members or costumes.
My kids were excited to meet Mickey in 2002 at Walt Disney World. If we'd waited a couple of years, he could have spoken to them, but by then my daughters would have been older and not as thrilled. Disney Dan has 14 videos in the series so far, covering Donald Duck, Winnie-the-Pooh, Peter Pan, Dumbo, and more. Eventually, he'll get around to doing costume videos on the Disney Princesses. -via Metafilter