His special subject is countries of the world and he’s extremely knowledgeable on it (he’s 6 years old). His memory is incredible and he can draw a map of the world from memory and name every single flag.
But the one issue is that he doesn’t stop talking about it from the moment he wakes in the morning, until the moment he goes to sleep. Everything about it in all different forms - smallest to largest countries, eye colours of each country, populations, borders of each country, food from each country and so on and so on.
It’s never ending and as much as I enjoy hearing about it, it’s wearing me down.