We are grandparents traveling with our 14 year old grandson this July. We are going from Stuttgart to Berlin. Trying to decide to either fly or take a train. The train would be fun expierence I think but it is over 6 hours since we would leave from the airport due to returning our rental car verses a 2 hour flight. Flying these days is not so easy. Any advice would be appreciated. At this time we do not plan to rent a car in Berlin.
Thanks