We've shown you neat effects with ferrofluid and magnetic putty. Did you know you can make your own iron putty? This video makes it looks quite easy. Don't forget the magnets -that's where the fun begins! In case you forget the recipe, it's written out at Buzzfeed.
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There are recipes around for ferrofluids too. But the quality and effects you get can depend heavily on how fine of a powder you use, what surfactant you use, and what medium is used. Some of the stuff gets quite expensive.
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