But what if gramma is paper thin?

I just bought tickets to see Coraline tomorrow.  I opted for the 3D versions, which may be a mistake but I keep earing how 3D Digital is actually very good so I decided to give it a try.  When order tickets on Fandango they give you the option of "Adult," "Senior" or "Child."  Except inthis case is was "Adult, "3D Senior" or "3D Child."  

Which brings up lots of questions.