(answering here your question from Roland's thread)
The world of the 50's is not the world of 2016. Ask your parents, or grandparents.
Back in these days, it was much more common for the whole family to go to the theater. There, you could watch the news, see a serial, watch a cartoon *and* see the movie you came for in the first place, while eating chips. All at an affordable price, too.
Also, do not forget there were not many color TV sets back then in the US.
https://en.wikipedia.org/wiki/Television_in_the_United_States#History_of_American_television
(" Half of all U.S. households had television sets by 1955, though color was a premium feature for many years ")
... and no home video, too, obviously.
Disney cartoons were produced for theaters, and for the whole family. Donald in Mathmagic Land was a theatrical release in 1959.
The experiment I made a few years ago, was done to check if people who had the opportunity to see it since then (there were multiple reruns on TV), did get the message in the cartoon. Which is : mathematics are everywhere around us, and shape the world.
Well, I sadly had my answer that day.