silly american, under 18 means nothing in italy
1. food, become a fatso. icecream, pizza, and cakes have a completely different taste
2. try not to get ripped off, they can tell an innocent turist from miles
ive never been to any of these 3 cities but the commercial and turist areas are pretty much the best to stay at, n you'll probably go past them if you will be guided.
try talking to girls, they dig turists big time