We will be going to Italy for our summer holiday next year, mostly on the Tuscan coast. I want to book a couple of nights in either Pisa, Siena or Florence before we get to the coast. We have four children ages 5-13. Our DD will turn 14 while we are away and I thought she would like a city stop. Pisa would probably be the most convenient but I had a quick look online and people don't rave about it. However, I thought the boys might love looking at the tower. I haven't been to Florence since my honeymoon many years ago. In August would it be to busy to take a 5 year old? He did pretty well in Barcelona this summer but we were all shattered after a long day and spent quite a lot of time just in a park. Where would you book of the three destinations?