There are two ways to deal with absences of knowledge like that. One is to alter the material presented so that the absence doesn't matter. The other is to keep on including the stuff people don't understand, and give them a motive and the opportunity to find out what lies behind them.

The latter way is called education, and isn't a bad idea at that. What's the opposite of education? Because that's what the former way comes down to.

The popularity of Harry Potter suggests to me that children are still pretty curious about things they don't know, when they are interesting things.