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And that is a bad thing? ;^).

BTW, the explo tinkering studio came up with a really cool tubeless wind tube design using a grid of straws suspended over the fan to create a laminar flow or some such explo arcana.  The bottom line is much more hands in/hands on than the tubes.

e

On Sep 4, 2012, at 4:55 PM, Patricia Verheyden <[log in to unmask]> wrote:
> 
> Once we tried feathers: but visitors ended up throwing in all the feathers at once and part of the surrounding exhibition area got  covered with feathers
> 


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