The Tech Museum of Innovation in San Jose is a science museum focusing on interactiving with technology. Nearly all of the exhibits are controllable in some fashion; allowing you to create your own roller coaster or experience an earthquake. While more hands on for the kids it was still interesting.
In the medical section they have a picture of a human body populated with buttons. Pressing a button would result in a video clip being played describing the healing and replacement parts available for that region. So while I’m reading the instructions this kid comes along and presses the button over the brain. He then glares at the TV which explains that we can’t replace the brain yet. Not satisfied with that answer he presses brain again… and again… and again… I left him to it.