Any ideas for something to do at, or near, CDG for 7 hours in the afternoon in September? We've been to Paris several times, so pushing to get to see the Eiffel Tower isn't very appealing.
You could visit Senlis, 20 minutes by bus from CDG. Here's a link to a town guide: http://tinyurl.com/23bm6e. And here is the bus schedule: http://tinyurl.com/rfbrb.