Wim,

!! That's a great idea, and very, very well done!
Did you have the microscopes pre-configured so all the kids could do was look, or was someone there to assist them and make sure everything worked correctly?
And can I steal and idea or two from your exhibition?
I ask because last October, I had a booth at the 11th Science and Technology, Education Partnership Conference in Riverside, Calif. I had 5 Olympus BH-2 microscopes set up for the kids to look through at mostly clinical specimens (breast and lung cancer cells, normal blood, blood cells in leukemia, bacteria and yeast, and a nice 2" liver fluke that really shocked them). It took three of us to run herd on the ~3500 grade school kids who came through in a day and a half.
It was great fun and the kids and teachers loved it. I'll be going back again this year, but what a circus trying to handle the huge crowd.
http://myscienceeducation.com/PDF/STEP1 ... _AM_PM.pdf
http://myscienceeducation.com/
Tom