Surprise surprise! We booked tickets to visit my family in Germany over Christmas. Cheap ones, too, but it means we'll be flying via Frankfurt to Amsterdam and then backtrack by train into Germany ... we'll loose a day of vacation time this way but it saves us $400/ticket x 4.
And we'll be spending a few days in Berlin. I have a pretty good idea what to see in the tourist category, mostly indoor stuff (Reichstag, Museumsinsel, Mauer, one of the chateaus ...). But I'm also looking for ideas of something a bit more different that could interest my teenage daughters 12 and 14 then. Maybe a street with some funky shops (not too expensive)? Are there certain walking tours that include more indoor time as well? Winter weather in Berlin can be really ugly!
I've ordered guide books but haven't received any, yet, so the girls have no idea right now what they would like to do.