My family would like to do this. My youngest will have turned 16 2 days before the day we plan to try this tour (one reason for the trip , sweet 16th). She looks young for her age with freckles and cutesy-look, but not a mature 16 like my oldest was. What kind of I.D. will they ask her for? She only has a school i.d. I see I have to sign waiver for her, but is it an honesty thing or should I bring her birth certificate. Even that wouldn't prove who she is.......help, SUE 
