You might also want to check with the Carnegie Museum of
          Natural History in Pittsburgh. I was just there, and though
          my kids are  too young to participate, it looked like it was
          well done.
 
          You also might want to check with children's museums such as
          the Brooklyn Children's Museum (Carol Ensecki??), or the
          Boston Children's Museum.
 
          Good luck.
 
          Eric Siegel
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