Don't be fooled.... It is NOT that easy haha. My husband was trying with me (granted I was using a household hammer and not the heavier one you're supposed to buy for $10) and he was getting them a little deeper than I was but still not that pretty lol.
Finally, I broke down and bought the copper pieces because they are MUCH easier to stamp than metal washers! I ended up making a necklace for my sister-in-law who is busy planning for her new family! It is a "Family Tree" and says "Sister" on one side and "Mother" on the other side. There is also a "P" on the bottom, but it's a little hard to see in my pictures. I loved how it turned out, and it gave me a little practice to try for some more!