I just came back from a trip to Kansas City and made a specific effort to visit The Money Museum at the Federal Reserve Bank there. If anyone is within a few hours drive from this museum then I greatly encourage people to visit.
It had a lot of interesting information and displays about how the Federal Reserve Bank works, what services it provides, the history of it including some a wall of guns and equipment used by their security guards through the years. They even had a windowed room where you can see the processing lines and vaults where workers were bundling millions of dollars of cash and coins.
However, the HUGE display that really made me

was a coin display where it was like one huge typeset. They had put together all the series of coins that were minted during each president's term in office from Washington to today including all the gold issues. They even included all the classic commemorative series and all the different quarter designs minted from 1999-on. There was also a large amount of paper currency there as well with some higher denomination notes I've never seen like a James Madison $5,000 bill and a Woodrow Wilson $100,000 bill.
Very cool and was all free. I highly recommend it.