In 2010 Nathan Hoang, aka The Moosehead, aka DisasterPieceTheatre, while recovering from a knee injury and inspired by the flags appearing in TV coverage of the FIFA World Cup, created Flags of the World: A Non-Digital Interactive Pop-Up Book. He then filmed himself (presumably) opening each page and showing its interactive magic, all set to music (appropriately enough, the song Brazil). The 2 minute and 55 second, 230 flag YouTube video of connections between flag designs has been viewed a paltry 139,000-some times since 2010, showing that there is not justice — nor enough vexillologists or pop-up-book aficionados — in the universe.
Here are some animated gifs, from nathanhoang.com/flags-of-the-world-pop-up-book, in case you haven’t yet been persuaded to click play on the above video.