One of my favorite children's book from my childhood was a book called Caps for Sale by Esphyr Slobodkina. The peddler would walk up and down the streets selling caps that were balanced on top of his head.
While we didn't see the peddler on our trip, there was a hat shop in Oregon that sold all sorts of hats. Our favorites were the funny/silly ones. What a fun, no expense way to create memories! Or maybe pick up a new parasite?