Magician handkerchief
youmagine
I found out about it from : https://diypuzzles.wordpress.com/2015/01/07/magician-handkerchief/details on the puzzle and shapes that can be made are on the link.Use openjscad file provided here to generate STL with different hexagon size and different thickness.STL provided here is 5mm hexagon outer diameter and 3mm thickness.
Download Model from youmagine
With this file you will be able to print Magician handkerchief 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 Magician handkerchief.