If you have about an hour and are in the area, I would suggest you stop in for a tour. You can see when Nixon lived as a child and they give you a short tour of his childhood home.
When we were there, they also had a replica of the White House which was really neat -- very intricate --but I don't know if they have that exhibit anymore.
I wouldn't make a special day trip to this library, but if you're in the area, it's worth a visit.
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