Goalball is a competitive sport played three-against-three, indoors on a gym floor--primarily by blind and visually impaired athletes.
There are two teams playing against each other, with one on each end of the 60x40 foot court. All players are blindfolded to make the game fair. This is due to varying levels of sight among players. Some are legally blind, some are totally blind. The blindfolds ensure equality among players.
The object is to roll a three-pound Goalball, which is sort of like a heavy basketball with a bell inside, past the opposing team without them stopping it. It's the opposing team’s job to block the ball using a full body blocking method.
Minimum age to play is 10 years.