Not your ordinary dice

Print with #2 side up, with 100% in-fill.

Use a black permanent marker to colour in the dots.

As you print, you will see why these are not your ordinary dice. They are biased to roll #6. As you roll the 3 dice, there's a very high chance that one of them will roll #6.

Use it for fun only. Do not use it for any real/serious betting.