Goalball is a team sport for the blind and visually impaired. Sighted people can play too, using blindfolds, but to play in a national team you have to be registered blind. Each game lasts 14 minutes (split into 7-minute halves), and involves two teams of three players and of course the goalball, which is a big heavy textured ball with bells in it. The object is to bowl the ball across your opponents' goal line.

The game was invented in 1946 by an Austrian, Hans Lorenzen, and a German, Sett Reindle, and was originally devised to help rehabilitation of blinded war veterans. It's been a paralympic sport since 1976, and the first world championships were held in Austria in 1978. It's a fun and fast game.