[header] How to consult the i ching using 3 coins [title] Gather your coins. [step] You can consult the i ching with whatever coins you have handy. Pennies are a good option. 
If you want to add significance to the process, you can use coins minted in years that mean something, such as your birth year. You can also purchase old chinese coins if you want to add authenticity to the process.