Tactile dice

I noticed, playing a board game, that my parents had problem reading the dice results, due to their eyes age. That was the seed of this object. An easy to read dice was born!
Why is it better than regular dice for visually impaired people?:

• There is much contrast (due to longer shadows) in every engraving, to be more readable
• The dice is slightly bigger than usual (2cm side)
• You can touch the upper side of the dice and understand the result of your cast, even if you didn't learn braille.

It's a small object that will please a range of people, from low vision to totally blind ones. Furthermore this is a particular dice that will make curiosity even in people with good sight!