London: An awfully big city adventure

Our itinerary was built around the trinity of dinosaur fossils, a clock tower, and a big wheel. Everything else would be a bonus. So said my six-year-old son, Caelum, after I had revealed his Christmas gift — a two-night trip to London.
Yes, there were plenty of bones of extinct reptiles and views of every angle of Big Ben (except the bell itself), and the slow rise and fall over the city at night inside a glass bubble over the Thames.