Our family will be visiting Paris in June. We would like to visit the beaches of Normandy for the day. How can we get there from Paris? We are staying at a Marriott in Paris. Do we need to take a train or bus? Is there a guided tour from Paris? We will not have a car during our stay. What are your recommendations for visiting the beaches? Our children are ages 12, 11, and 5. My son is a huge WWII buff.