2003 marks the halfway point of the U.S. Mint's Commemorative Quarter Program. Every year, five states are featured on the flip side of newly issued quarters. By year-end, 25 of the 50 states will be represented.

Have you been saving your pocket change? The Googolplex Quarter Keeper is a terrific way to make sure your commemorative collection is complete. Building your 2003 Keeper is easy -- just click the oversized quarter right below this and follow the instructions.

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Just starting your collection? Visit these Quarter Keepers first:

Quarter Keeper 1999
Quarter Keeper 2000
Quarter Keeper 2001
Quarter Keeper 2002

The hardest part may be finding all of the quarters issued to date, especially some of the earlier coins in the series. Don't give up! Even if you were just a baby back in 1999, there's still a good chance some of the early issues are in circulation.

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How much do you know about the 2003 honorees? Our short quiz may teach you a thing or two about these unique five states.

Click here for COMMEMORATIVE CONUNDRUM 2003