In my eldest son's history readings, we kept encountering 'The Tower' into which people were shut, seldom to escape! Of course, this raised my son's interest ... "Why didn't people get out of the Tower? Is that where the Crown Jewels are kept?" In response to his questions, we arranged a visit to London so that he could tour the Tower and envisage what he is reading about. He went on the train with his Dad and Grandpa, and had a lovely day whilst learning a lot!