For last minute ideas check out Paris Avenue , a bilingual site run by the French daily newspaper Le Figaro , great for those parents whose children have already done the kiddie tourist circuit. Paris Digest has a children's section with practical info for museums, gardens, and amusement parks for children. There are plenty of toy shops, department stores, and candy shops, all done in that particularly enticing French fashion. There are so many museums in Paris that at least one is bound to please. For adventurous youngsters, there are tours of the Paris sewers and the creepy Catacombs.
Cathedrals are free and usually impress even the most jaded children.
If you're stuck with unexpected cold weather, a day at the indoor waterpark Aquaboulevard will make up for it. Paris Tourisme's website page Paris for Kids is a good place to look for more ideas. Under 'attractions' you'll find the Sega game centers, one with a cinema sized screen where your kids can test their skills against the French competition. Check their website for the calendar of events and contact info. If, however, you'd like to go out on the town and your children or infants haven't recovered from jetlag, there are a number of babysitting options for English tourists.