Bingo is a great game for all age groups, and very easy to learn. Every player has their own card, containing twenty five numbers arranged in a grid (some bingo halls use different sized grids, but twenty five is the most common amount). For every turn, an announcer will read out a number, selected at random from a container. If the game is being played at home the announcer may simply pull a number from a bag, but in a bingo hall there may be an elaborate, complicated looking machine with numbered balls bouncing about inside. The number is read out - usually in a comical, idiomatic manner, such as "two fat ladies, eighty eight!" Any player whose card bears the number just announced will then mark it off. In a bingo hall, where your number grid is actually built into the table, you may have to slide a piece of plastic over the number. At home, using a more modest set up, you will probably cover the number with a square of paper. The announcer will continue to select and call out numbers until one player forms one of the agreed patterns on their cards. The most usual pattern, called full card or blackout, consists in covering all the numbers on the card. Other patterns are lines, and L shapes - the required type will be specified at the beginning of the game. The winning player must shout out "Bingo" to be eligible to win.