FerroMagnetic Fluid Test Tube
$ 6.95
Make your very own ferromagnetic fluid and experiment with magnets with this easy-to-use test tube kit.
Each test tube contains a bag of special magnetic powder and a strong magnet, so when you suspend the powder in a liquid, you can place the magnet near the tube and watch the amazing magnetic power.
Non-toxic, and biodegradable.
Ages: 8+.