Without build ups, there'd be few games at which your kids could win.
If I were to take my kids down a midway and didn't recognize any of the joints, I'd only allow them to play the build ups.
Florida fuzz know absolutely nothing about the games. I've seen them take easy to win joints, and force the operator to make them much harder, sometimes even impossible, in order to open.
If it has a flat surface, they make you level it, totally ignoring the laws of physics.
Every crowd has a silver lining - PT Barnum