Though the technical description of ferrofluid is "a stable colloidal suspension of superparamagnetic iron oxide nanoparticles," we prefer to stick with "magnetic magic in a bottle."
Usually confined to scientific demonstrations, in the presence of a magnetic field ferrofluid essentially goes nuts—shifting into spiky three-dimensional shapes, bouncing from one magnetic pole to the other, and being generally fascinating in every way. By sealing this scientific oddity into a glass bottle, the team at Concept Zero has created the most hypnotic desk distraction of all time.
Concept Zero has also found a way to tint their ferrofluid, giving the magnetic "spikes" yet more definition and even appearing to change color. Available here in blue or gold configurations. Each Ferrofluid Display includes Concept Zero's neodymium magnet wand, great for bouncing the fluid all around the display.