We have talked about this in the past can't remember if any had posted this link. Got it from an antique newsletter I received.
Lynne
~~~~~~~~~~~~~~~~~~~~~~~~~ SQUISHED PENNY MUSEUM
The contents of the Squished Penny Museum may seem like pocket change, but these flattened coins are treasured tokens of road trips past. Squished 101 explains how ordinary pennies become tourist souvenirs -- not to be confused with the faux pennies that are accidentally squashed by trains or trucks. The site touches on copper mining and minting, relays stories about a cross-country penny-collecting trip, and invites you to take a pit stop at the penny meccas of the U.S. There are pennies of mystery, a penny of the month, and penny games. If you're in Washington D.C., you can even visit the museum (by appointment only).