Lost your d6? Flip three visually distinct coins, and use binary.

This Instructable is another cool way to substitute for a standard 6-sided die, and reminded me of the extremely geeky method we use. A great teaching tool for kids, too.

Step 1: Acquire Coins

It happens all the time: you open your favorite board game, and the die is gone. What to do?

Coins are readily available.
Just find three visually distinct coins: I've got a dime, nickel, and penny here, but you could mark up three of the same coins with a Sharpie to distinguish them if necessary.

Step 2: Understand Binary

This is pretty easy.

Designate one coin for each of the following:

2⁰ = 1 (assigned to the penny)

2¹ = 2 (assigned to the nickel)

2² = 4 (assigned to the dime)

Heads = yes, tails = no.

Flip (or shake and dump) your coins and add the values to figure out the value of your roll.

Step 3: Scoring Examples

Remember: dime: 2²=4, nickel: 2¹=2, penny: 2⁰=1

H H H = 4 + 2 + 1 = 7 (discarded- reroll)
H H T = 4 + 2 + 0 = 6
H T H = 4 + 0 + 1 = 5
H T T = 4 + 0 + 0 = 4
T H H = 0 + 2 + 1 = 3
T H T = 0 + 2 + 0 = 2
T T H = 0 + 0 + 1 = 1
T T T = 0 + 0 + 0 = 0 (discarded- reroll)

(For a d8 the TTT=0 is considered an 8, and none are discarded.)

Check out the examples below, then go roll dice like an MIT nerd.