Step 2: Foamboard itself
Then you make all 32 iron rods 50cm long. Each end of a rod has to be bend 90 degrees. Then you put the ends of the rods in the holes. When all the iron rods are in the right position, you can put a little bit of the instant adhesives between the crossings. This will make the iron robs more stable, so the blind person can feel where to put the letters.