I always stay in the Passy neighborhood, which is as kid-friendly as you'll find in a large city. Recommend l'Hotel Hameau, at 48 rue de Passy. They have family rooms, and the neighborhood itself is full of kids. There's a school a few blocks away, and we love grabbing a coffee at le Passy (bistro) and watching the kids walk to school with their parents. l"hotel Hameau is across the street from a classy new "mall" that features toy stores and a supermarket with easy, cheap, take-out options to eat in the hotel room - eating out with kids can be stressfull as well as budget-busting! A couple of blocks from the hotel is the local movie theatre (the Majestic), in case you need a movie night. And there is a McDo close by, if your kids rebel against Parisian food. :o) Cool, kid-friendly museums: le Carnevalet (the museum of the City of Paris), housed in an old mansion in le Marais. It has neato old stuff, including a death mask of Napolean and some models of le Bastille, etc., that kids would groove on. And it is FREE. Also FREE - the Petit Palais, which always seems to be full of school groups, and has a lovely collection that's edited enough to be a fairly quick visit. Finally, I would take 11 and 13 year olds to Centre Pompidou. Check out their website, but the last time I was there I remember a kids area with art projects....? Can anyone else comment on this? Also for children - there's an adorable carousel on each end of Pont d'Iena - which is of course the bridge right at the foot of the Eiffel Tower. You can hop on a Batobus at Pont d'Iena, too. Also great fun for kids - watching the toy sailboats in the Tuilleries, riding the huge ferris wheel at Place de la Concorde, getting a crepe from an outdoor stand, and perhaps the crypts? Have fun! What an adventure!