I have a huge Lego collection and always roll bad results on dice, so I figured I would use one to help make the other a little less painful.
This isn't the prettiest build, but I was in a hurry. It has a mix of old grey and new grey, as well as dirty and clean bricks. The bottom has a few slopes to catch and spin dice, and hopefully slow the momentum from the huge drop.
I put tiles along the bottom to help the dice sit flat and give it a weather beaten/sandy finish.