Message Hider
thingiverse
Place the Message Hider on paper, pen your covert message within the cutouts. Remove the device, then scribble a false note around your true message. Pass on the coded text to a friend. When they position their Message Hider, it unveils your secret missive.
Download Model from thingiverse
With this file you will be able to print Message Hider with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Message Hider.