Things I learned:
1. Don't expect your child to sleep soundly the whole way over the ocean just because they're good sleepers normally. Have plenty of entertainment available. Necessities: Good headphones, various flavors of gum, and a kid sized fluffy blankie and pillow.
2. Don't expect your picky eater to suddenly want to eat everything put in front of her, just because you're in Venice! Luckily, she truly enjoyed the bread, potatoes (not so much those other veggies) and she loves prosciutto and salami. And gelato!!! And brie or gnocchi!