My family and I are planning our first trip to Europe, and our first stop will be in London for 4 days. Looking over our itinerary, I realized that we still had some free time and was wondering if Buckingham Palace is worth taking the tour. Looking over the prices, I realize that it's a bit expensive but I thought it might be fun to do, although Rick Steve's book on London says that it's not all that amazing. Any thoughts? Thank you.