Red-filter concept | Okay, you know those kids' books where there's a secret message hidden in the picture, and the way to see it is by using a red plastic filter that changes the colours so the message is visible? How about showing the football scores on tele like that, so one person can be watching a film or a soap or something, and somebody else can check the latest goals whenever they want by holding the special glasses up.
Red-filter concept | Okay, you know those kids' books where there's a secret message hidden in the picture, and the way to see it is by using a red plastic filter that changes the colours so the message is visible? How about showing the football scores on tele like that, so one person can be watching a film or a soap or something, and somebody else can check the latest goals whenever they want by holding the special glasses up.