Waldensian-Christians in the medieval period were accused by propaganda of commiting sodomy with a demon in the shape of a cat and that they had to commit the Osculum infame by kissing the ass of said cat-demon.

It was also common in medieval Germany to belief that the german word for heretic "Ketzer" had it's origin in the german word for cat "Katze" and was refering to people who did similar things with cats as the Waldensians were accused of. In truth the word "Ketzer" goes back to an italien word for the followers of Catharism, but that wasn't widely known at the time and so many allegories were made of heretics and cats.

There is a french animation franchise with the title "Once Upon a Time...". They did a series about human biology, history, science fiction, the age of discovery and the history of the USA and while it is dated, it's some of the best material I have experienced that gives young children a broad understanding of history and science in general.

I would start young children with that before anything else and leave deeper topics of history for later.

Edit: Also if your child starts to take interest in any part of history. Feed them books from Osprey Publishing. They go a damn good job of showing the tools and clothes of past centuries and you learn more about history if you know the technologie the people had back then in their daily lifes, than from tales of wars and political events.

It's basically fake history, similar how renaissance intellectuals claimed the christian middle age was a "dark age", modern intellectuals like to hate on the past as imperialistic to make themselves look more enlightened.

The other side are Anti-European intellectuals from ex-colonies, who use it as a tool to justify their hate of Europeans. The irony is that most of those people have the same "might makes right" mindset like those dead Europeans they complain about. They are the real life version of the french comic figure Isnogud.

Honestly it's terrifying how demented this part of humanity is. You see really well educated individuals decry an event from centuries ago as the worst thing to ever happen, only to brush off the crimes of present day political entities as something justified.