Points #1 and 3
Most museum educators have accepted the idea that learners need to be active, that in order to participate in learning we need to engage the learner in doing something, in hands-on involvement, in participatory exhibits and programs. But the more important point, I believe, is the idea that the actions which we develop for our audience engage the mind as well as the hand. Not all experiences are educative, as Dewey pointed out in Experience and Education. This does not mean that they necessarily have to be complex---but they do need to allow the participants to think as they act. I recently saw a videotape of a group of children building a cardboard ramp which would serve as an inclined plane for an experiment they were to do. What the video tape showed was a fifteen-minute period in which the children spent time measuring, constructing (and wandering around) with little idea of what they were building or why they were building it. It was a hands-on activity that was not likely to be educative as intended for two reasons: a) The children had no chance to incorporate what they were doing into a larger picture: the focus was on completing a task, which for them must have appeared to be just one more of the senseless requirements of school. b) There was no opportunity to alter the task to fit the meaning-making of any individual student. They all simply measured strips of paper 24 inches long (the US is still not on the metric system) and 1.5" wide, everyone following the same recipe with no variation.
By way of contrast, I have watched adults look at a map of England at the dock where the Mayflower replica is berthed in Plymouth, Massachusetts. Repeatedly, adults will come to the map, look at it and then begin to discuss where their families come from. (I could imagine an even more elaborate exhibit at the same place which would include a map of the world and different ways in which people have immigrated to the US, so that all visitors could find something to interest them.) But at least for those who trace their roots back to England, here is an interactive exhibit (even if there is little to "do" except point and read) which allows each visitor to take something personal and meaningful from it and relate to the overall museum experience. For me, the Diaspora Museum in Tel Aviv came alive when I had the opportunity to call up family genealogies on the computer in the reference center. The opportunity to view and manipulate a library of family trees covering several generations and a wide geographical distribution, gave personal meaning to the idea of a Diaspora.
Physical involvement is a necessary condition for learning for children, and highly desirable for adults in many situations, but it is not sufficient. All hands-on activities must also pass the test of being minds-on---they must provide something to think about as well as something to touch.s.