We have just returned from spending a few days in Venice with DD (3). We thought it might be a problem to take a toddler on a city holiday, but it turned out to be an ideal place to take her, so I thought others might like to think about going there. The city is compact and easy to get around, there's no traffic and there's lots to catch a young child's attention - from carvings, to bell towers, to beautifully-decorated shop windows. Everyone we dealt with, in our hotel, in shops, in museums, was friendly and, of course, Italians are very nice to small children. The only caveats are that the child needs to be old enough to be sensible about travelling on water buses and crossing bridges. And take a lightweight pushchair, because you need to carry it over bridges frequently.