Ferrofluid is a fascinating material to play with; a seemingly magnetic fluid that can move, dance, and form incredible patterns when magnets are brought close to them. Ferrofluid is fun to play with, but the iron oxide powder required to make it can be difficult to find. With this activity, you can make your own version of ferrofluid, using only iron filings, a test tube, and some water! Grab a strong magnet, and get ready to dance your way through the science of magnetism!
WaterTest tube with cap
Strong magnet (neodymium or ceramic magnets work well)