Loads of games require you to roll two regular dice (or 2d6 is gaming slang) and when you do, not all scores are equally likely. 12s and 2s are rare while 7s are common. See the graph above.
But remarkably it's possible to exactly recreate that distribution of scores with a 3 sided dice and a 12 sided dice!
We call it the Recast 2d6!
Price = p109 pence = £5.99