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I'm looking for a material which could be used by visitors in a workshop or class (minimum one hour in length) to make sundials suitable for installation and use outside.

So the material needs to be:

weatherproof (waterproof, rigid, able to take a pigeon landing on it, a cat attacking the pigeon, and a blast from a garden hose intended to discipline the cat)
easy to work with (lost-wax bronze casting is out)
cheap (clay is cheap but this museum does not have a kiln -- there may be one nearby)

I'm out of that wonder material, unobtanium, and I'm looking for a substitute.

Marc Taylor
Coordinator, Andrus Planetarium
Hudson River Museum
511 Warburton Avenue
Yonkers, NY 10701
914 963 4550 x223
Fax 963 8558
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