I'm flying to Munich on 7/21/14 with my wife and twin 10 year old boys. This will be our first trip to Germany. We will be flying out of Frankfurt on 8/6/14. Looking for some help with a hole in my Itinerary. The flights are set in stone but everything in between is still being worked out. We are looking to use the train system as much as possible but if it is needed I can rent a car for a couple days.
Please don't get caught up on how much I have listed each day. I do not expect to be able to do everything. I am traveling with children and plan to take it easy and do what we can but I always prefer to have plenty of options so that we can change plans on the go if circumstances call for it. We have also been known to find something completely by mistake and scrap a day's plan just to go do the new activity that looks fun.
This is what I have so far:
Mon.    21-Jul  1   Overnight flight to Munich.                                                                                          Plane
Tues.   22-Jul  2   Residenz? Nymph ? Probably just rest from long day traveling.                              Munich
Wed.    23-Jul  3   Hohenschwangau und Neuschwanstein.                                                           Munich
Thur.   24-Jul  4   Viktualienmarkt. Marienplatz. Englisch Gartens.                                          Munich
Fri.    25-Jul  5   Legoland Park in Gunzburg.                                                                                          Munich
Sat.    26-Jul  6   Deutsches Museum. Haufbrauhaus.                                                                          Munich
Sun.    27-Jul  7   Early Train - Salzburg. Explore Castle? Music Concert.                                           Salzburg
Mon.    28-Jul  8   Berchtesgaden. Konigsee. Explore.                                                                            Salzburg
Tues.   29-Jul  9   Saltmine? or Werfen Castle? Explore.                                                             Salzburg
Wed.    30-Jul  10  Train - ??? (Chiemsee on the way?)
Thur.   31-Jul  11  ??? 
Fri.    1-Aug   12  ??? 
Sat.    2-Aug   13  ??? 
Sun.    3-Aug   14  Train - Rothenburg. Explore. St Jacobs Alter. Watchmen Tour.                             Rothenburg
Mon.    4-Aug   15  Train - Bacharach.Explore. Relax.                                                                            Bacharach
Tues.   5-Aug   16  River Boat - St Goar. Rheinfels Castle. Explore. Train - Bacharach.          Bacharach
Wed.    6-Aug   17  Fly out of Frankfurt to - Oslo, Norway for second leg of trip.
I'm not sure what to do days 10-13. We could go south of Munich to GaP and the Zugspitze area. Mittenwald? Is there anything there to interest 10 year olds? We could also head farther north as long as we don't get too far from Rothenburg. Any and all ideas are welcome.
Thanks!