is there a senior discount?

Yes

Yep

Yes - I visited yesterday and purchased my tickets from the standalone self-service point of sale terminals outside. When you come to pay, there is an option for Seniors to select.

Yes ma'am if im not mistaken

A small amount, I believe.

Yes... and not worth it

Yes, but it's only $2

I'm not a senior. When I was there, the line was apparently 2 hours long... NOT WORTH IT. I just took selfies in front of it.