12. The Haunted Bookcase
Bring your library to life with a haunted bookcase where books move on their own. By attaching thin fishing line to the pages of open books or mounting books on small, hidden motorized rotating platforms behind the shelf, you can make it look like a poltergeist is browsing your collection. A video showing a hand reaching for a book while others nearby mysteriously slide outward or flip their pages open creates an incredible illusion of real paranormal activity that will have commenters debating how you pulled it off.