Depending on the age of your children, there are actually a few great areas to stay in Paris if you are traveling with your family. Saint Germain is our recommendation because it is central, there are a ton of shops and restaurants and you are close to family-friendly activities like Luxembourg Gardens, the Botanical Garden, Seine River cruise, and Notre-Dame Cathedral. If your kids are a little older then we would suggest the 4th or the 1st Arrondissements.