I made these book mobiles for our play room. They were really simple. I just tore out the pages from some old books I thrifted. Then I took a paint stick and glued that to the book binding to give something for a screw to hold onto. Folded the pages and glued those together with Fabri-tac and then glued those to the paint stick. Screw a hook screw into the binding of the book and done!
They're a lot lighter than they look so they end up being really secure once I hung them.
It was a pretty easy and inexpensive little project. They're perfect for our little reading corner.