As a little boy who grew up in New Jersey, I recall it being a rather big deal when my aunt visited around the 4th of July. That’s because she lived in Pennsylvania and she would bring fireworks, illegal to purchase in the Garden State, for us to set off in our driveway.
Today I live in the Keystone Commonwealth, in a town most people like to call Pittsburgh. My friends who grew up in the region insist that they routinely traveled to Ohio during their childhood in order to purchase play explosives, which are illegal in Pennsylvania.
Oddly enough, I have a roommate who has a brother with a young family in the Buckeye State. They drive to Indiana to purchase their Roman candles.
Theory posed: One cannot legally purchase pyrotechnics in the state which one also possesses a valid driver’s license.