I'm in Berlin for a few days, with the kids and one of my sisters-in-law. Em wanted to attend a BTS concert, but couldn't get a ticket, so we decided to go anyway.
It's just enough time to visit the obvious landmarks. Yesterday, we already did a sightseeing tour by bus and went to a flea market, walking down Bernauer Straße. There are markings all over the city indicating the route of the Wall; on Bernauer Straße, they built new houses right where people jumped out of the windows to get to the West sector, right before the wall was erected, and where they shot people trying to flee from the GDR.
We want to go to the KaDeWe today, not spending any money there, and to the Museum of Illusions, and then see what other things we can do.