Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Radio is a children''s playground game played by children. The game''s history is unknown. Usually 7, 8 or 9 people are required to play this game (However it is possible to play with 5 or 6 people). Once enough children are found to play the game, they all must sit in a circle. Then a leader (often called "The announcer" or "The disc jockey" because of the title of the game) is selected who must choose two numbers that will be repeated twice and start the game. If the leader chooses 2 and 9, then the leader must start the game by saying 2-2-9-9 (said two, two, nine, nine). Then the person next to the leader (The children may select if they want to go clockwise or counter-clockwise) will repeat the second number for his/her first number and pick his or her number (For example 9-9-4-4) and then send the focus of the game on the next player. The next player will then pick his/her number (4-4-7-7) and pass the combination on to the next player.