Now, there's nothing wrong with PNBs bringing kids to museums (my parents did, I'm a museum junkie to this day), but make sure it's age appropriate and a level they can understand themselves. I'm fine with quiet kids in a museum, just DON'T READ THE SIGNS ALOUD. Actually, that doubles for adult who do that to themselves aswell.
I was so close to biffing an American tourist who was doing that with a Viking ice skate in a museum in Uppsala.