Yes there are tours and there are also offers such as the quarters minted for the 250th anniversary of this country. UNITED STATES MINT GOVERNMENT SITE
Denver, COPhiladelphia, PA
Washington, DC
San Francisco, CA
West Point, NY
Fort Knox, KY
Now, private businesses are offering $2 bills that are color enhanced (I never heard of such a thing being legal but it must be), but officially, the United States mint has created five new quarters designed to celebrate the 250th anniversary of the Declaration of Independence.
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Deep in my memory is a tour of the mint in Washington DC when I was about ten years old. I was in awe of the sheets of paper money that were so messed up that they were in a bin, likely on their way to a big paper shredder.