OP's kids are 11 and 13. I don't think they'd really want to see the outside of a 1930's exhibition hall at EUR. Maybe Ostia the kids might consider worth the trouble to get to, just maybe. I think the suggestion for Villa Borghese was spot on for the parents, and it won't bore the kids either who will enjoy the park.
Last edited by Perche; Mar 18, 2015 at 3:09 pm