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ramidarigaz
on Dec 20, 2011
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Dropping a Magnet Through a Copper Pipe
That sounds ridiculously fun. I may have to go do that. I just need a beach...
HeyLaughingBoy
on Dec 22, 2011
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You can just buy iron filings cheap from these guys:
http://www.scientificsonline.com/catalogsearch/result/?q=iro...
DanBC
on Dec 21, 2011
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Or you can buy fine wire wool and snip it into tiny bits.
b_emery
on Dec 21, 2011
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about any old sand box will also do (the real kind).
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