This fun date night/FHE idea comes from "Family Home Evening for Newlyweds" by Deborah Pace Rowley.
Go to the library or a local book store like Barnes and Noble or Deseret Book and read children's books to each other. Find Dr. Seuss books you loved as a kid. Reread "Where the Wild Things Are" or other favorites.
When you have finished exploring the kids' section, recommend adult or adolescent books to each other. Is there anything you read as a teenager or more recently that you loved and want your spouse to read? Check the books out if you're at the library or see if D.I has what you're looking for for cheap!