It might be interesting for the kids to look at Kelso, Melrose and Dryburgh Abbeys as they are today, on Google Maps Street View. Most of the ruination dates from that time. And that was the smallest of the three invasions of the 1540s. (The language of that description will be completely unreadable for any third-grader, but they will be able to make sense of the list of places "raced" - i.e. razed).
Many of those placenames are still identifiable on the map, but in a lot of cases there is absolutely nothing left above the ground from before the raids. In the whole of Edinburgh there are only a handful of buildings left from before Edward VI's reign, the devastation was more comprehensive than Hiroshima.