but it might be worth a peek. As a blog last decade on the Great American Coin Co. website noted, some kids put coins into toy boxes thinking they are either toy coins or worthless trinkets.

The combination of "copper" and "penny" might not seem like the best formula for valuable coins considering that you can find ...

But finding the right copper coin could make you a millionaire ... The most valuable Lincoln penny is worth $2 million on the collectibles market, and many more are worth five or six figures.