"Is fish brain food?"
"Will food left in an open tin can be poisoned by the tin?"
"Are raw eggs more easily digested than cooked eggs?"
Such questions, posted on big bulletin boards, are part of a game that in the past year has enticed over 30,000 visitors to the Cleveland Health Museum. Beside each question is a little flapdoor; behind it, visitors find the answer (answer to these three questions: No).* The museum is full of other tricky gadgets: e.g., by turning a crank, a visitor gets a model demonstration of the right and wrong...