Flip that Book

Have you seen this idea?  I saw the pin, from Funky First Grade Fun and think it is fabulous!

source

How fabulous would it be to have books stay open while you read them?  This may be moving to the top of my summer to do list.  Here are the books I would spiral bind.
-The Sisters Books
-On Solid Ground
-About the Authors
-Growing Readers
-Reading With Meaning


Have any of you done this?  Which books would you flip?
Happy Saturday,