I would suggest Edmund Scientific, offhand.  Maybe Orion Telescopes...

Greg Stevens
Education Specialist, Discovery Cart Program
Smithsonian National Air and Space Museum


>===== Original Message From Museum discussion list
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>Hello Everyone,
>
>I'm developing a weekend workshop in which children
>will build working telescopes.  Can anyone suggest a
>good supplier of convex and concave lenses?
>
>Thanks,
>Dan
>
>
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