Ferrofluid gadgets are a lot of fun to play around with. They are used in speakers, lava lamps, clocks, and everything in between. We have already covered plenty of cool ferrofluid gadgets here. This Spiky Ferrofluid Pendant is also worth a look. It has a metal outer frame that protects the glass tube. It has 0.1ml of ferrofluid.
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You can order this in square and round version. As the maker explains, this pendant has gone through various updates to address some common issues with ferrofluid gadgets.
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