If you’d like a real peek at early animation by Walt Disney, watch Trolley Troubles! It was the theatrical debut of Oswald the Lucky Rabit, although it was actually the second Oswald short. (The first, Poor Papa, was rejected by the studio.) Trolley Troubles is available on Disney+, and you can probably find it easily enough on YouTube. Not only is it a glimpse into the creative mind of Walt Disney, it’s a lot of fun to watch.