You carry it in your pocket, do it whenever you feel like it, and hand it over for examination. As simple as that

Perform multiple magical color changes on one coin!

You show the public a Chinese coin, both sides are black.

He rubs it a bit and both sides of the coin turn red.

Another painting, and the coin turns blue on both sides!

No changes, no weird movements the coin is handed over for examination.

The public will be impressed by this half dollar sized Chinese coin.

Includes nickel-plated coin and online video explanation in English.

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