We've been to Paris a few times as a couple, but are thinking of a few days there this month with our 4-year-old...
Any ideas for places to go, things to do?
The obvious things are the Eiffel Tower, various parks (if it doesn't bucket!), the Seine (any advice on the best boat trips?).
Any short trips out of Paris by train?
Any good (interactive?) museums/etc?
Good places to eat/stay?
...or are we mad?