What is Ferrofluid? In short, it is a liquid that responds to magnets and magnetic fields. The longer answer is ferrofluid is an extremely fine powder, coated with a soap-like material called a surfactant, suspended in a mineral oil liquid base. The resulting magnetic suspension is called a ferrofluid.

When no magnetic field is present, ferrofluid behaves and flows like a normal liquid. However, when a magnet or magnetic field is introduced, the ferrofluid is attracted to the field. Spikes then form along the magnetic field lines when the magnetic surface force exceeds the stabilizing effects of fluid weight and surface tension.

This set includes...

• FREE 100mm x 15mm petri dish
• 50mm x 9.5mm petri dish
• 2 ounce bottle of ferrofluid
• Ceramic OD1.25" x ID0.375" x 0.25" ring
• Ceramic 0.625" x 0.375" disc
• Neodymium 0.5" x 0.5" x "0.125 block
• Neodymium 0.25" x 0.5" rod

This item is great for teaching kids about science and is a lot of fun!