Get together some materials:
• Various coins
• Paper (I suspect thinner paper works better, but I just used some scraps)
• Non-slip mat (these are sold in the kitchen wares section of most department stores, it's just a foam mesh that you can cut with scissors)
• A map (optional)
Step 1: Make Some Pencil Rubbings
Then, use the pencil almost flat against the paper, rub back and forth, only pressing gently. This should transfer the image to the paper.
When the image is there, cut out the ones you like, and tape them to your map!