A box with led illuminating letters.
The principle box contains a 5V led light band, a light switch & a current plug are screwed through it.
The bottom box is made to store the letters.
The 3 parts are simply fix with elastic wires.
Ice Filament (black) - Amolen (marble) - Basicfil (clear)) PLA & PET
black - marble & natural clear PET
Depending on the resolution of your printer. Increase or decrease the scale of the letters in order to make sure that they easily slide into the upper part.
The number of letters to print depends on the relative frequencies of letters in your language.
For french I printed the following quantities.
Overview and Background
Make sure to adapt the adapter power to the corresponding voltage of your band led.
Lesson Plan and Activity