For quite a few years, "Bockscar" the plane that dropped the second bomb on Nagasaki, was a "walk-through" fuselage display at the Air Force Museum about 3 miles from my house (less as the crow flies) in Dayton OH.
I've looked through the bomb sight and had my finger on "the button" Probably when I was 12-14 Years old.
It was a long walk, but me and some friends would usually do it several times each summer.