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Hello fellow list members,
   Does anybody know of a good material that rather quickly reacts to bright
light? I don't know if this exists, but something like it would be perfect
for an activity we are planning.  Ideally this material wouldn't react to
room-intensity light, but if a flashlight hit it, it'd change color or
something.
   I know I am making this up entirely, but if there is something close I
know you all will know about it.
Oh, and it's gotta be safe around kids, of course.
Thanks for any help you can offer.
-mike k

        Michael Kerkman
        Botanical Educator
        The Huntington Library, Art Collections, and Botanical Gardens
        1151 Oxford Road
        San Marino, CA 91108
        626-405-3586
        [log in to unmask]

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