idellwig created this awesome 3D printed 20-sided dice (d20) with braille numbers for the visually impaired to play tabletop RPGs like Dungeons & Dragons! The 3D printer model file is here if you want to print your own! He originally designed this for a blind friend of his who likes to play pen and paper RPGs. He was searching for a D20 with braille numbers since ages. So he modeled and printed this one:

Source: idellwig / Felicia Day

(via: Geek Girls)