Beach balls may bring back fond memories of days at the beach, or even at your favorite concert hitting a beach ball around. But when were they invented? According to Time, beach balls were invented in 1938 by a man by the name of Jonathon DeLonge.
Beach balls are inflatable balls primarily used at beaches and for other water games. They are also popular to play with at large crowded events like sports and concerts, though that is usually frowned upon.
Sources:
http://content.time.com/time/specials/packages/article/0,28804,2049243_2048649_2049004,00.html
https://en.wikipedia.org/wiki/Beach_ball