Tunnel books are unique and fun! A tunnel book is a three-dimensional movable book that you read by looking through it. Originally from the mid-18th century, tunnel books are enjoying new popularity as an art form in their own right. The tunnel books you've seen may look complicated, but I've developed a method that simplifies the process so that students from 3rd or 4th grade and up can be successful making tunnel books of their own. We'll use a postcard as a prompt for writing an original hai