Is the interaction physically tiring? Is it mentally tiring? Is this necessary and, if so, is there room to rest?
Are individuals told what to do? Is it reasonable to expect individuals to follow those rules?
What story does the interaction tell? Does it have a satisfying beginning and end? Does the individual need to experience the elements in a particular order?
Will individuals understand what to do if they pay little attention to the instructions?
Does there need to be a particular number of individuals for the interaction to work?
Does the interaction work for individuals and groups? Couples and tour groups? School groups?
Will individuals spend as much time as you hope? What if they don’t?