If you go to Paris, they have an AWESOME Moroccan restaurant called "La Baraka" (sp?). My dad found it while working as an airline pilot when he use to fly to Paris regularly. Our family eats there every time any of us visits Paris. The family that owns it are VERY nice (and VERY VERY talented at cooking Moroccan food) and we've become good friends. My sister even lived with them for a summer and visited Morocco with them for a few weeks. Their son visited the US and stayed with my family as well. If you'd like, you can let me know through PM or email if you (or anyone else here visiting Paris) are interested in going to La Baraka and I can get the address and phone # as well as see about getting you an extra friendly welcome. Another good food you can get in Paris are the chocolate crepes you can get from street vendors (we always got them in the morning, but I'm not sure if they're served all day).
As far as fun things to do.. Well, it's probably not fun for us adults on here, but it was REALLY fun when my brother and I visited Paris at ages 8 and 10. If you chew one end of a McDonald's straw, you can blow in it to make a whistle like sound. Ironically, this sound was almost exactly the same as the chime the subway makes when the doors are closing. Without realizing it, my brother and I were blowing into the straws to make the sound when we saw the crowds of people cram and push each other in a frantic attempt to get on the train before the doors closed. We did it at the next few stops and the results were the same. Fortunately the people had a good sense of humor about it after they realized the doors weren't shutting when they heard the chime and saw 2 kids blowing straws to make the sound.