Spirok Rhythmic Ferrofluid: electromagnets produce changing fields to make a ferrofluid dance. I’ve posted similar devices, but this one takes the art form to the next level- and includes a quality Bluetooth speaker system. Ferrofluids are colloidal suspensions that are challenging to contain in a non-chemically reactive environment, the fluid in this device is really amazing- shown here moving to the rhythms of Tahüm. ➡️ Follow the link in my @physicsfun profile for info on where to get this de