[Ghoulish Delight]

Note, my view may be skewed, having grown up Jewish and thus having already been exposed to most of the themes presented at the museum pretty much since I was born.

But, that being said, 6th grade is about the age it's aimed at, I feel. The information is certainly intense at times, but that's the point. It's been a while since I've gone, but I don't remember it being heavy on graphic shock-value stuff. There's some, you can't tell the story of the Holocause with it, but it's not the main focus. Just enough to get the point across that the consequences of intolerance were quite real. It's purpose isn't to scare or frighten. It's about awareness.

As for what to talk about beforehand, if he doesn't know already, it would be good to be aware of what the Holocaust was. It's only a portion of the museum, but it's the most intense (obviously). As long as it's not his first exposure to it, the museum should just reinforce how real it was.