You’re on a comping trip with some friends and decides to throw a role-playing game session. But alas, you have no dice 😦
No worries; Here’s how to throw the dice anyway, using the “Human Dice”:
One person (the Games Master) thinks of a number from 1-6. This number represents a dice throw of “6”, the “Actual 6”. The other person calls out a number from 1-6, the “Dice Throw”. This number is compared to the Actual 6 like this: If the Dice Throw is equal to the Actual 6, then the throw is a 6. If it is 1 below, it is a 5 etc. It goes in a circle so that if the Games Master thinks of a 2 as the Actual 6, and the player calls out a 5, then this is actually a 3 (2 is a 6, 1 is a 5, 6 is a 4 and 5 is a 3). Simple.
If there is doubt about the sincerity of the Games Master, or if he wants to remove all such doubt, he writes down the Actual 6 before the player calls out the dice throw.
Now you can play Amar anywhere, without any accessories, like with your kids when they go to bed – a bed time story on steroids 🙂
Geir Isene - uncut 
It’s a cardinal rule in board game design to always avoid subtractions in die rolls when you can add instead. People find it easier to add numbers than subtract them.
Change the “Actual 6” to an “Actual 1” and add instead of subtract and you will be better off as far as most people’s minds work.
EXAMPLE 1: You choose a 4. Your kid rolls a 6. Four is 1, five is 2 and six is three.
The result is three.
EXAMPLE 2. You choose a 2. Your kid chooses a one. The die roll is 6.
That will also do nicely. My kids (7 and 11 years old) got used to my system in about one minute.
But that is a great way to create die rolls without dice. Some LARPS do it this way.
Of course they did. I didn’t know if you were seriously making rpg story games for a bigger audience. If so, addition increases processing speed over subtraction and adds a psychological feeling of increase. Plus it’s easier to count on fingers for kids that are not as smart as yours.
Good points.
Another way to roll dice is to use a hand with these gestures ala Scissors/Rock/Paper:
1. Index finger out.
2. Peace Sign.
3. “Ok” sign
4. Thumb in palm four fingers extended.
5. Open hand.
6. Fist.
Oh yeah, and playing cards work great. A deck can give 1-6 in four suits. Just give each player a suit and they can shuffle and reveal.