Step 1: Collect your materials!
The first step in creating a foreign coin fridge magnet is to acquire coins of a foreign (to you) nature. I accomplished this through eBay (coin search. I spent about $15 after shipping on a lot of 50+ coins.
You'll also need magnets and some type of adhesive to affix the magnets to the coin. I picked up some typical round magnets from the craft section in Wal*Mart. I also grabbed some Aleene's Tacky Glue. I chose the clear to make it easier to cover up my mistakes :).