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Bob Products makes these large-scale professional displays which use electromagnets to play with the strange and unusual properties of ferrofluid. The systems can be programmed to manipulate the magnets and fluid while displaying lighting and sound effects.
We’re not sure what sort of magnets Chemical Bouillon used beneath their container of ferrofluid, but they used them to manipulate the wondrous magnetic fluid into some fascinating organic patterns. More here and here.
Damjan Stankovic and Marko Pavlovic’s Rhei works a lot like the Ferrolic Clock, except it uses mechanically operated magnets instead of electromagnets to control the ferrofluid. Its animation is a lot simpler, but none of the shapes produced are exactly alike.
Zelf Koelman’s Ferrolic Clock uses ferrofluid suspended in clear liquid and electromagnets to steer the fluid into place to display the current time as well as abstract patterns. Zelf will produce a limited run, for a whopping $8500 ea.