Ferrofluid is a magical fluid infused with nano-sizes particles that react to magnets. In this cool desk accessory, you get a glass bottle with colored Ferrofluid in it, which is a big deal on its own, as until recently, Ferrofluid was only available in black. As you move the magnet (included) outside the glass bottle, you’ll see the magic liquid forming cool shapes. You can use the magnet to spike it, flip it, throw it… or you can add more magnets to create more fun reactions.
See it in action: