I have a small plastic container of different kinds of dice, which I use to generate passwords from my own Diceware-style word lists (see <a href="http:&#x2F;&#x2F;world.std.com&#x2F;~reinhold&#x2F;diceware.html" rel="nofollow">http:&#x2F;&#x2F;world.std.com&#x2F;~reinhold&#x2F;diceware.html</a>). I like the 10 sided dice so that I can roll 4 and pick any number from 0000 to 9999. For an RPG that needs a &quot;random&quot; percentage, two of these (in different colors) would suffice. Any board game store has an assortment of crazy dice for sale.