One study had asked kids to draw pictures. The Americans drew houses, their family, a hill and maybe the sun while the Brit kids would draw dragons and castles. I think that British history is ingrained in people in a different way than in America.
I think it would depend on the child. I would probably have drawn rockets and dinosaurs. And I'm sure there are plenty of American children who play fantasy games involving dungeons and castles.
I don't have children and never attended school in the UK, but I think that some children would just naturally be more interested in history than others. A lot of this would have to do with whether their teachers made it interesting for them or not.
Just as some kids develop an interest in science, or any other topic, and some don't.
The perspective from which history is taught might differ, though. In school, I was always taught history from a social perspective. I didn't just learn about dungeons and castles for example; I learned about serfs and feudalism.