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The Exploratorium has a few exhibits along those lines. I loved this
one called Avalanche:
http://www.exploratorium.edu/cmp/exhibits/a/avalanche.html
You might also check out Aeolian Landscape and Rift Zone:
http://www.exploratorium.edu/cmp/exhibits/a/aeolian_land.htmlhttp://www.exploratorium.edu/cmp/exhibits/r/rift_zone.html
Becky Fox Matthews
Educator & Special Projects Manager
Adventure Science Center
800 Ft. Negley Blvd.
Nashville, TN 37203
615-401-5073
www.adventuresci.com
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