Address Piazza Navona, Rome Map,
This famous 17th-century piazza is always teeming with activity. There are street performers, live music, and lots of people. There's also a beautiful fountain that toddlers will love.
Cafes and restaurants line the square. In general, they're good, but pricy. That said, this is a great place to dine with kids because the kids can get up and take in the scene while you're waiting for your food. There are also two reasonably good toy stores on the square.
In December a Christmas fair is held in the piazza. There are games, toys, and nativity scenes.