 The pins had counter cultural meanings as well; for example, the pin featuring the robot spacecraft Kosmos 186 (which approached and docked with Kosmos 188) had a sexual connotation.In recent years, pin collecting and trading has also become a popular hobby.Demand for pin designs based on popular cartoon characters and themes such as Disney, Betty Boop, and Hard Rock Cafe has surged and led to the creation of pin trading events and other social activities.