As final thesis in product design I'm developing a board game that can be played also by visually impaired people, so that they can play with their friends and have fun all together.
Here is a dice model I made in an early stage of development. Maybe not the most useful thing on Earth, but you can check the blend file and use it as you wish.
Modeled in Blender 2.65, rendered with Cycles.
That's a nice model. However, I guess such dice would be kinda loaded, since their density would be different within themselves.