Disney's snow white and the seven dwarfs is a film that I used to watch as a child and didn't fully appreciate how good it was for the time. Released in 1937 they used Cel animation and a team of people who hand drew each part of the scene.
Cel animation is where they use thin sheets of paper to draw on, then over lap a new piece and using a light box, traced over the first drawing and added additional moments so that the character appears to move. It is incredible at how long this took to make, which was 3 years. This must have took a lot of hard work, dedication and patience to create this amazing film that in the 20th and 21st century people still like to watch. I don't think this film ever get's enough credit for just how amazing the production process was.