This listing is an educational set which shows the magnetic field via the magnetic liquid - ferrofluid. This set includes 2 ounces of ferrofluid, a petri dish and some magnets. A pair of gloves and a plastic dropper is also included in the set for your convenience. The following is the list of the items included,
This item is great for teaching kids about magnetism and has a lot of fun!
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.
Note: The ferrofluid leaves permanent stains to fabric, pvc counter and furniture. The ferrofluid will also be attracted to magnets when close to it. Please operate carefully to avoid spills.
There are 1 review(s) for 2 oz Ferrofluid + Magnets for Fun! Kids' Science Project Kit
by Your Name – 12th Jan 2013
The ferrofluid reacts as it is supposed to, however it should be warned that the solution leaves a black film wherever it has been (i.e. if you lead it up the sides, or on the top of the petri dish there will remain a black spot in that area). Also, the connection between the ferrofluid and the magnets is stronger than the seal of the dishes, which can lead to a mess. Thankfully, the ferrofluid can be washed off of skin with soap and water, but I would advise not getting it on your clothes. Altogether, a pretty fun and intriguing product, though I would recommend a different container.