Hidden Door Diy . Set the door in place and place the pin into the socket. Next in our list of hidden door ideas is a hidden door made out of a revolving bookshelf. DIY Hidden Doors Hunker from www.hunker.com Then when you tilt that “book” forward, it pulls. Opening the door check instructions here this plan is so clever because it makes a small space seem larger with an. With this kit that includes hidden door hinges, you can complete your home with your own hidden room for kids to play, store your valuables, or use as a safe room.