Cartoon images of "worshiping cats" on the Chinese 100 yuan RMB banknotes, "the equivalent of the 'Eye of Providence' on the US dollar," probably weren't designed as cartoon cats. A coin expert noted that there were no cat's whiskers on the bank note, as shown on the "clarified" image. But if you're looking for hidden images in Chinese currency, World War II era Chinese currency has many cases of hidden messages and over-printed propaganda (part 2 of a series on WWII Allied banknote propaganda).
If you've ever heard the song Aquarela do Brasil (often called simply "Brazil" -- here's my favourite cover), then you'll probably enjoy this classic 1942 animation which first made it famous. The clip is the finale from the feature Saludos Amigos (hello friends), created during a US government-funded goodwill tour of South America aimed at strengthening Pan-American relations, which some argue may have helped bring South America onto the side of the Allies in World War II. [more inside]
"Japanese Relocation" - A short propaganda film created by the US government & the "Office of War Information - Bureau of Motion Pictures." The subject has been much discussed previously on MetaFilter. Here and here, among other threads.
A Nazi Christmas Since its most ancient days, the Christmas holiday has been continually reshaped to serve commercial, social, and political ends. These Nazi-era Christmas materials, including an Advent calendar and an essay on how to turn Christian holidays into National Socialist ones, come from the German Propaganda Archive of the Calvin College library. Of course, the Allies also enlisted Christmas in both pop culture and propaganda with cards, V-Mails, and posters.
Battlefield 1942 Propaganda Posters are very handy for the times when you need to call someone a smacktard.