Our family is likely spending a month in Dublin this summer, and will have two weeks in late July to travel somewhere else in continental Europe (in-Ireland excursions are another post for another day). 3-city itinerary suggestions to help us get started researching? (Yes, just 3, excluding day-trips.)
Kids will be 7 & 4.5, so we want to show them another culture, but don't expect them to remember much. We traveled pre-kids in Europe, so London, Paris, Madrid, Barcelona, Prague, and Budapest are all out for now. We have always enjoyed being based in one place for 4-5 days to wander around in depth, and also incorporate a day trip, and with little ones, that pace will still be fine. One 3-stop option would be an Alps area tour (say Munich, ??, Venice). Another is some 3-city combination of Belgium, Netherlands, Western Germany, Copenhagen and/or Oslo (or other suggestions). We will fly in from Dublin and can fly or train between cities - train patience level is probably a 3-4 hour ride. No jet lag factors, so a Friday afternoon flight means we can hit the ground running on Saturday.
It's been a long time since I researched a trip like this, and it's hard to tell how close everything really is, so I appreciate your suggestions to help me get oriented.