I love penny smashers. I have a paradoxical attitude toward souvenirs: on one hand, I like to have reminders of places I've visited as well as a physical token of "proof" that I've been there; on the other hand, I hate household clutter and don't like to spend money on what amounts to junk. Penny smashers fill a perfect role. They are literally a token of proof that I've been to a place, while also taking up almost no space and being very cheap.