Eleven of my wife's family and friends are meeting in Paris to celebrate her 40th birthday in mid September. Our group includes her parents in their late sixties, 2 of her aunts, our three young sons and thier cousin all aged less than 9 and 4 of us in our mid to late 30's. None of us have been to Paris before. We hoped to do something during the day with the children and her extended family and the four of us do something in the evening. We are looking for suggestions to make the day special. The children are well behaved and used to eating at formal restaurants however something less formal like a cruise might be more interesting for them. In the evening we would like to eat somewhere nice then go to a nice bar or club. I would appreciate any suggestions.