via Gizmodo
Ferrofluid is a beautiful mess of iron particles suspended in oil, but the beauty comes at a price of $165 a liter ($624.59 a gallon, for you Standard folks). Let's take the DIY route to this, shall we?
Before you run off to grab the magnetic ink developer, ferric chloride, or recycled cassette tapes needed to make it, let's review what ferrofluid is and how it works:
Basically there are plenty of uses for the liquid, in engineering, electronics, optics, and most importantly: art. Due to the oil portion of ferrofluid following the iron particles, you can control the substance with some strong magnets and make it dance around like in the video.
