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3) Simple to use: camera is ready to go out of the box ( NO Batteries Needed )
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Magnetic Cylindrical Ferrofluid In A Bottle #505 3) Simple to use: cameraFerrofluid is the astonishing liquid that becomes highly magnetized in the presence of a magnetic field. Comprised of nano scale magnetic particles suspended in a transparent liquid, undisturbed ferrofluid forms into a smooth pool. But when a magnet is brought close, ferrofluid reacts in strange and fascinating ways. With Ferrofluid in a Bottle, you can safely and easily play with this spectacular substance. Using the included neodymium magnet(s), you