We will arrive in Berlin july 11 (after a 10 hours flight including a layover in Zurich) around 11 am. We stiil haven't decide how many nights we should spend there (4 or 5). We have two yound kids (4 and 8 tyears old). We plan to do the basic touristic stuff : Brandebourg, remains of the wall, topography of terror, tv tower, Reichstag, couple of free museums, some monuments, the zoo.
We don't know if we should stay there 5 nights of 4 would be enough for our plans.