In honor of Martin Luther King Day, I went with my daughter’s school class on a trip to see the National Underground Railroad Freedom Center in Cincinnati. It was quite moving, even for second-graders, to see a slave pen, a two-story structure rescued and preserved inside the Center. The movie on slave escapes across the river was a bit intense (and loud) but the kids came away with a deeper understanding of our history. I recommend visiting the Center when you get a chance.