Pickleball is a racket sport in which two or four players use a smooth-faced paddle to hit a perforated, hollow plastic ball over a 34-inch-high (0.86 m) net, until one side is unable to return the ball or commits a rule infraction. Pickleball is played indoors and outdoors. It was invented in 1965 as a children's backyard game in the United States, on Bainbridge Island in Washington State. In 2022, pickleball was named the official state sport of Washington.