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.
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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