BestPrice 8 x 12 Green Magnetic Field Viewing Film Fun

8 x 12 Green Magnetic Field Viewing Film, Fun!

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8 x 12 Green Magnetic Field Viewing Film, Fun! Item Description:
Encased within the green film are millions of magnetic particles suspended in oil The viewing film will become lighter or darker when a magnetic field is applied It turns dark when the field lines are perpendicular to the surface and it turns light when the field lines are horizontal ie acros Read More..

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