The Nebraska State Museum and Philadelphia Academy of Sciences both have 
interactive fossil "digs" in their exhibt/discovery spaces. You will 
have to contact them to find out exactly what the stuff is but they both 
use synthetic "sand" that seems to be easy to clean up, isn't dusty, and 
is not a potential source of food for insect or rodent pests.

Julianne Snider

Marty Buxton wrote:
> Our dig has been an indoors activity in plastic tubs. The material we settled on 
> was ground corn cob which you can get at feed stores. We found that it is clean, 
> easy to sweep up, and acts like coarse sand. We have used a variety of 
> "specimens" in it from plastic animals to laminated parts of skeletons.
>
> Marty Buxton
>
>
>
>
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-- 
Julianne Snider
Assistant Director
Earth and Mineral Sciences Museum & Art Gallery
116 Deike
The Pennsylvania State University
University Park PA 16802-2709
814-571-6317
fax 814-863-7708
[log in to unmask]

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