To begin, you’ll need to find some magnetic coins containing iron or nickel. Certain ferromagnetic elements, notably iron and nickel, can become magnetized when placed in an external magnetic field.
Many steel or nickel-based coins fall into this category. When these magnetic coins become magnetized, they can stick to each other to form elaborate towers.

By suspending the coin tower underneath a strong magnet, the coins remain magnetized and continue to stick to each other, and the magnet helps support the stack against the force of gravity. The magnet pulls hardest on the topmost coin, which is closest, and helps stretch out the coin stack to keep it from folding.


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