Impossible Wallet

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A post shared by physicsfun (@physicsfun) on Apr 21, 2020 at 7:52am PDT

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Impossible Wallet: this pocketbook has a special double hinge that allows the wallet to be opened from either side, and leads to some rather nonintuitive consequences. Note that once inserted, the bill shows the same face independent of which way the wallet is opened. The construction of this magic (or flip) wallet is similar to the famous Jacob's Ladder toy.