The first wheeled suitcases appeared 50 years ago. Before 1970, luggage was lugged and shoved through airport terminals around the world. By adding casters, the humble invention transformed travel and eventually led to the carry-on bag trend.

In the classic game Pin the Tail on the Donkey, players use a push pin to attach the tail to the donkey. On a metal or plastic toy donkey, however, a push pin would be unable to hold the tail in place, especially if it needs to move in some way. A better choice for this application is a solid metal dowel pin.