My parents love Harry Potter. My mom just turned 60, and for her birthday my dad got them tickets to see Daniel Radcliffe on Broadway in How to Succeed. Her review was "Our little Harry Potter is all grown up!"
They've read all the books, and they love the movies. When I was in London with my mom a few years ago, we went to Kings Cross and took pictures at Platform 9-3/4.
My friend's mom is also a huge fan - she's a teacher, and she works afterschool programs. She used the books to help kids learn to read.