My recommendations:
Deutsches Museum
technology, natural sciences, lightning, aircraft, submarines, stars, physics.
enough to spend several days...
BMW Museum München
shows 125 years of BMW with many original cars, motorbikes and aircrafts
Archäologische Staatssammlung
120.000 years of archaeology
Landesamt für Digitalisierung, Breitband und Vermessung
shows 200 years of measurements (Fraunhofer, Senefelder...)
BR
PeLuLe