Hello Janet Sweeting,
    Please forgive the slow response to your inqiry. While not dealing
specifically with natural history, Please Touch Museum is committed to children
seven and younger and their caregivers. The bulk of our audience is in the 3-5
y.o. range that you asked about. The issues are similar in exhibit/program
design regardless of content. Keeping the ideas and activities developmentally
appropriate without thoroughly alienating other visitors is a challenge.
    Since your question is rather global, it might be more fruitful, when you
frame specific questions and concerns, that you give us a call. I would be
happy to help in the process.
Aaron Goldblatt
Director of Museum Services
Please Touch Museum
210 North 21st St.
Phila., PA  19103
(215)963-0667 v
(215)963-0424 f
agoldblatt@delphi,com