What’s Different?

There's an old Sesame Street song "One of these things is not like the other, three of these things are kind of the same". My cousin posted a picture like this on Facebook, so I decided to do the same and see if you can tell what's different :)

Yes, they're all coins. Yes three of them are silver and one is copper, but that's not what's different! Have you found what's different? Look closely, do you see that George Washington on the quarter, Franklin Delano Roosevelt on the dime and Thomas Jefferson on the nickel are all facing left? Only Abraham Lincoln on the penny is facing right.