Has anyone done the Viva Italia trip with children? We have 4 children, ages 11, 13,15, and 16, and I wondered if they are old enough to appreciate all there is to see on the daily tours. Do the tour guides make it entertaining or captivating for them? What can they do during down time? The last thing I want to do is bring them all this way only to have them complain that this isn't fun. Any input from those who have brought children would be appreciated!